Dream about him at times (7)
I believe the answer is:
chimera
'dream' is the definition.
(I have seen 'wild dream' mean 'chimera' so perhaps 'dream' could also mean 'chimera')
'about him at times' is the wordplay.
'about' becomes 'c' (abbreviation for 'circa').
'at times' becomes 'era' (I can't explain this - if you can you should believe this answer much more).
'c'+'him'+'era'='CHIMERA'
Can you help me to learn more?
(Other definitions for chimera that I've seen before include "fabulous creature" , "Fire-breathing female monster" , "eaders of radio appear after jingle" , "Chair me to find mixed monster of Greek myth" , "Illusory achievement; mythical beast" .)