Still keeping skirts for lady diarist (6)
I believe the answer is:
evelyn
'diarist' is the definition.
(John Evelyn 17th Century diarist)
'still keeping skirts for lady' is the wordplay.
'still keeping skirts' becomes 'eve' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' is a charade indicator (letters next to each other).
'lady' becomes 'Lyn'.
'eve'+'lyn'='EVELYN'
Can you help me to learn more?
(Other definitions for evelyn that I've seen before include "London diarist" , "John --, gardener and diarist" , "Novelist . . . . . . Waugh wrote 'Brideshead Revisited'" , "- Waugh, English author (Scoop)" , "man?" .)