Lady, still unclothed, grabbed by first male turning up (7)
I believe the answer is:
matilda
'lady' is the definition.
(woman's name)
'still unclothed grabbed by first male turning up' is the wordplay.
'unclothed' indicates the central letters.
'grabbed by' means one lot of letters goes inside another (inserted letters are grabbed inside).
'first male' becomes 'adam' (first man in the Bible).
'turning up' says the letters should be written backwards.
The middle letters of 'still' are 'til'.
'adam' backwards is 'mada'.
'til' going within 'mada' is 'MATILDA'.
(Other definitions for matilda that I've seen before include "Empress Maud" , "See 17" , "She waltzes in Australian song" , "one celebrated down under" , "12th century English empress" .)