Across
Underworld figure a new painter like Picasso laid bare (6)
I haven't cracked this one yet — but Fifteensquared have:
A + N (new) + C UBIS T (Pablo Picasso [1881 – 1973] was one of the co-founders of the Cubism art movement) excluding the outer letters (laid bare) C and T
Car company compresses hydrogen - a large fuel source (8)
I haven't cracked this one yet — but Fifteensquared have:
([ CAR + CO {company}] containing [compresses] H [chemical symbol for hydrogen]) + A + L
Doctor mentored us with excellence (10)
Plant found by river in bog (4)
Very funny situation includes a boy dressing (10)
I haven't cracked this one yet — but Fifteensquared have:
SCREAM (very funny situation) containing (includes) ( A + LAD [boy])
Very popular electronic video service that was shut down (4)
Turn away from neighbourhood area for one further on? (8)
I haven't cracked this one yet — but Fifteensquared have:
DISTR I CT (with A [area] replacing [for] the second [further on] I [Roman numeral for one] to form DISTR A CT )
Start to launch missile right away in case (6)
Almost run aground close to lighthouse (6)
Ultimately drove Vauxhall right into ditch - weird! (8)
I haven't cracked this one yet — but Fifteensquared have:
EL ( final letters of [ultimately] each of DROV E and VAUXHAL L ) + ( R [right] contained in [into] DITCH
We should punch knocking out fellow second (4)
Art lover at renovated airport moves people with this? (10)
Candid old writer (4)
We are discovered moving Shiite jug at start of prayer (10)
European left darts having bagged 500 doubles in separate legs (8)
I haven't cracked this one yet — but Fifteensquared have:
([ E {European} + L {left} + DARTS ] containing [bagged] D (Roman numeral for 500) all reversed (doubles [turns sharply back on one’s course])
Animated bouncer set off to throw out boor at last (6)
I haven't cracked this one yet — but Fifteensquared have:
T R IGGER (set off) excluding (to throw out) R ( final letter of [at last] BOO R)
Down
Story born yesterday about rook and rodent (9)
I haven't cracked this one yet — but Fifteensquared have:
NAIVE (overtrusting and unworldly; gullible; born yesterday) containing (about) ( R [rook – chess notation] + RAT [rodent])
Grandiose wine at bottom of tank cold (9)
Collector of rings and fancy coins (5)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (fancy) COINS
Most remote bird eating leeks on occasion (7)
Put together dope crest spending millions on diamonds (9)
I haven't cracked this one yet — but Fifteensquared have:
ASS (diot; dope) + EMBLE M (crest) replacing (spending … on) M (millions) wit D (diamonds)
Column bloke is rewriting (7)
Bully essentially harassed teen in kind (7)
American news spun Republican departing with additional comments (9)
I haven't cracked this one yet — but Fifteensquared have:
A (American) + ( N [new] + N [new] – giving ‘news’) + R OTATED (spun) excluding (departing) R (Republican)
Stick around cinema for ending with grandeur (9)
You bet after lone card originally turned? Fold! (9)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (turned) LONE and C [ first letter of [originally] C ARD) + SURE (certainly; you bet)
A fire boosted by this roars (7)
I haven't cracked this one yet — but Fifteensquared have:
BELLOWS (roars) double definition
A sucker for soldiers? (7)
I haven't cracked this one yet — but Fifteensquared have:
ANTBEAR (an animal that eats ANTS [soldiers] by sucking them up in quantities) – cryptic definition , I don’t think there is any additional wordplay or definition
Display slice of austere gateau on the counter (7)
Mechanic at the rear stops to modify Fiat (5)
Type letters or click words in the clue