Women in timber pinch and twist (5)
I believe the answer is:
tweak
'pinch and twist' is the definition.
(I've seen this before)
'women in timber' is the wordplay.
'women' becomes 'w' (standard abbreviation).
'in' means one lot of letters goes inside another.
'timber' becomes 'teak' (I can't explain this - if you can you should give a lot more credence to this answer).
'w' going within 'teak' is 'TWEAK'.
Can you help me to learn more?
(Other definitions for tweak that I've seen before include "Pull and twist" , "Adjust finely; pinch" , "Twist; adjust finely" , "Slightly shift" , "[TUG]" .)