12 across is: Trace viceworker on land from report (9)
Letters: S - I - T - - - A
And I have just worked out, having woken up and started trying, as I was doing yesterday evening, to put letters in spaces, and having also worked out the rest of 6 across and 7 down, that gave me L for the eighth letter. So then, having also remembered, from the last time this clue came up, that it was not an anagram of 'trace vice' but a synonym of trace, I could see that it must be SCINTILLA.
However, I cannot work out how the answer complies with the clue an would much appreciate an explanation, please.
ETA 05:55) Answering my own question!
S-IN >> vice
TILLA >> worker on land; report - sounds like
but still no reason for the C!
10:15:Cryptic completed, but just one more question, if I may.
Clue: Raise army to besiege island (5)
Letters: H - I - T
Answer is HOIST, but I can't see why.
Otherwise, I had to google two answers which required info about a Beettles' cover group, and the other about a film.