A daughter wearing the first lady's skirt (5)
I believe the answer is:
evade
'skirt' is the definition.
(I know that skirt can be written as evade)
'a daughter wearing the first lady's' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'wearing' is an insertion indicator.
'the first lady' becomes 'eve' (first woman in the Bible).
'a'+'d'='ad'
'ad' going into 'eve' is 'EVADE'.
(Other definitions for evade that I've seen before include "Shirk" , "avoid answering" , "Circumvent, dodge" , "Get round" , "Dodge by cleverness or trickery" .)