Female with diary to sell (4)
I believe the answer is:
flog
'sell' is the definition.
(thesaurus)
'female with diary' is the wordplay.
'female' becomes 'f' (abbreviation).
'with' is a charade indicator (letters next to each other).
'diary' becomes 'log' (I've seen this before).
'f'+'log'='FLOG'
'to' acts as a link.
(Other definitions for flog that I've seen before include "Lash" , "Scourge, whip" , "- - a dead horse" , "Exchange for money" , "Beat with a whip or rod" .)