Hit tunes as recollected by fan (10)
I believe the answer is:
enthusiast
'fan' is the definition.
(I know that fan can be written as enthusiast)
'hit tunes as recollected' is the wordplay.
'recollected' indicates an anagram (letters recollected and rearranged).
'hit'+'tunes'+'as'='hittunesas'
'hittunesas' is an anagram of 'ENTHUSIAST'.
'by' acts as a link.
(Other definitions for enthusiast that I've seen before include "Ardent supporter" , "One deeply interested in a subject" , "one not at all cool" , "Fan" , "Devotee" .)