the wordplay will yield an extra letter:
20d Girl, perhaps, hot in cloak (8)
the answer is condensed into 5 letters for grid entry so although I do have some crossing letters they may not help. The answer will have these letters (in this order) + some more in between... S N T H
Extra letter in the wordplay is Y
22d Confined to a particular area (part of Norfolk?) unruly group twitch (8) .....N T C probably ends TIC
Extra letter in the wordplay is F