Across
Grasshopper fouled D-Day kit (7)
Look likely to make an honest offer (3,4)
I haven't cracked this one yet — but Fifteensquared have:
definition: to bid fair is to seem likely e.g. 'the project bids fair to succeed' to bid fair or to make a fair bid could also mean "to make an honest offer"
Riddle of the Jumblies’ craft (5)
I haven't cracked this one yet — but Fifteensquared have:
definition: a riddle is a type of sieve reference to Edward Lear's poem The Jumblies which starts "They went to sea in a Sieve, they did"
Let walrus swim in lake (9)
Car may tour a couple of lochs at the very least (9)
I haven't cracked this one yet — but Fifteensquared have:
MINI=brand of "Car", plus MAY (from surface) going around ("tour"): two letters L (short for loch) ="a couple of lochs"
Two novices go to ski here (5)
I haven't cracked this one yet — but Fifteensquared have:
definition: a region of the Alps TYRO and L (short for learner) are two words for novice
Invariable outfit I had (5)
I haven't cracked this one yet — but Fifteensquared have:
RIG="outfit" + I'D="I had"
Irritably, William accepts deferred payments (9)
She may offer sick camper aid (9)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"sick" of (camper aid)*
Shout out, giving this direction (5)
1-0 for United (2,3)
Reproached at length and clipped round side of head (9)
I haven't cracked this one yet — but Fifteensquared have:
to clip someone round the side of their head could mean to hit or bash their ear
Husband, unpack the vegetables (9)
What may arrive with biscuits some mutt’s about to eat for all to see (5)
I haven't cracked this one yet — but Fifteensquared have:
definition: a type of cheese, something that may be served with biscuits A DOG="some mutt" reversed/"about" and around/"to eat": U (Universal rating for films, "for all to see")
Leaving space for astronauts (7)
I haven't cracked this one yet — but Fifteensquared have:
when astronauts leave space, they re-enter the Earth's atmosphere
Recklessly determined, but fail after entrance (2-2-3)
Down
Coins and notes only, they say, in disputed region (7)
Sweetly pretty princess growing up: she’s 11 or 12 perhaps (9)
Hope engineers can plug reservoir (5)
It’s needed for the rest of the partners (6,3)
Lead off folk and blues singer that shows guts (5)
I haven't cracked this one yet — but Fifteensquared have:
remove "Lead" from Lead BELLY, the name of a "folk and blues singer" [wiki]
Some Irish devices stop working (4,5)
Announced change for place of wedding (5)
Sport convention in the country (7)
One’s utmost effort in French is condemned upfront (9)
Part of shoe considered torn (9)
Undeclared reserves that melt away when the heat is on? (5,4)
I haven't cracked this one yet — but Fifteensquared have:
definition: undeclared reserves of money [that might melt away / disappear when there is 'heat' from the authorities] "melt away…" is also suggestive of SLUSH in the sense of snow/ice
More disapproving of Mike opening elementary book (7)
Need to do this, suffering dry heat? (7)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"suffering" of (dry heat)*
Cat’s very light weight (5)
At rear of pasture, thin tree (5)
Problems a good grocer halved (5)
I haven't cracked this one yet — but Fifteensquared have:
for definition e.g. 'to give someone trouble' / 'to give someone aggro' A (from surface) + G (good) + half of GRO-[cer]
Type letters or click words in the clue