Across
Stay after passport centre makes a bit of a mess (7)
Former pupils gather pine to make shapes (7)
I haven't cracked this one yet — but Fifteensquared have:
OBs (old boys, so "former pupils") gather LONG ("pine")
Artist starts to date all Lowry's images (4)
Crime heads manipulated old scientist (10)
Talk again about environmentally damaging contributor to agricultural growth (6)
Add too much to sketch and get a negative balance (8)
I haven't cracked this one yet — but Fifteensquared have:
If you "add too much to a sketch" you may be drawing too much, or OVERDRAW ing.
Posh daily in top class city (9)
Scandal I believe is somewhat defamatory … (5)
… when copied thus? (5)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic(ish) definition
A gel NASA developed includes iodine for pain relief (9)
I haven't cracked this one yet — but Fifteensquared have:
*(a gel nasa) [anag: developed ] includes I (chemical symbol for "iodine")
Ask too much of tyrant, when America becomes Republican (8)
I haven't cracked this one yet — but Fifteensquared have:
OVERLO (r>A) D ("tyrant, when A (America) becomes R (Republican))
Check alien showing a means to gain entry (6)
Second rate shower might collectively display intelligence (5,5)
Swiftlet regularly seen on this place (4)
I haven't cracked this one yet — but Fifteensquared have:
S (w) I (f) T (l) E (t) [ regularly seen ]
Clear material picked up in accordance with plans (7)
Capital ensemble established in island has not been successful (4,3)
Down
Water-based dish from France is high level (7)
Chemical that removes hard bit from leather (5)
Trojan worker provides good support (7)
Cooked up plot to acquire fossil fuel (6)
Great activity that led to finished Verdi composition (9)
I haven't cracked this one yet — but Fifteensquared have:
OVER ("finished") + *(Verdi) [anag: composition ]
Upstanding Scandinavian infiltrates work unit producing small bomb (7)
I haven't cracked this one yet — but Fifteensquared have:
[ upstanding ] <=(DANE ("Scandinavian) infiltrates ERG ("work unit"))
Basic directions for what you are doing! (6,3,4)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic(ish) definition
Uneven treatment of most Irish (3,2,4)
Hot lines? Quite the opposite (7)
Dead centre of Gibraltar approached from the side (7)
Drink that did for group when Mike left (4,3)
Go, after throwing out rug (6)
Name for flowering plant with no root (5)
I haven't cracked this one yet — but Fifteensquared have:
COSMO (s) ("flowering plant") with no root (bottom (letter)) Cosmos is apparently a Mexican herb with colourful flowers.
Type letters or click words in the clue