Woollen clothing a king pinched (7)
I believe the answer is:
tweaked
'pinched' is the definition.
(I've seen this before)
'woollen clothing a king' is the wordplay.
'woollen' becomes 'tweed' (tweed is a kind of woollen).
'clothing' means one lot of letters goes inside another (some letters cover up or clothe others).
'king' becomes 'K' (chess abbreviation).
'a'+'k'='ak'
'tweed' enclosing 'ak' is 'TWEAKED'.
(Other definitions for tweaked that I've seen before include "Fine tuned" , "changed for the better" , "altered" , "Slightly adjusted" , "Pinched or twisted - or made fine adjustment" .)