Novelist concealing disgusted expression in polite greeting to woman (7)
I believe the answer is:
maugham
'novelist' is the definition.
(writer Somerset Maugham )
'disgusted expression in polite greeting to woman' is the wordplay.
'disgusted expression' becomes 'ugh' (expression of disgust).
'in' is an insertion indicator.
'polite greeting to woman' becomes 'maam' (formal term of address for a woman).
'ugh' inserted inside 'maam' is 'MAUGHAM'.
'concealing' acts as a link.
This may not be correct. It may belong to another bit of the clue.
(Other definitions for maugham that I've seen before include "W. Somerset -, writer" , "Author of 'Cakes and Ale'" , "Somerset --, playwright" , "Somerset -, English dramatist" .)