Work hard on record that is broken by learner crossword fanatic? (9)
I believe the answer is:
logophile
'crossword fanatic?' is the definition.
'work hard on record that is broken by learner' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'hard' becomes 'h'.
'on' is a charade indicator (letters next to each other).
'record' becomes 'log' (logging is a kind of recording).
'that is broken by learner' becomes 'ile' (I can't explain this - if you can you should give a lot more credence to this answer).
'op'+'h'='oph'
'oph' put after 'log' is 'logoph'.
'logoph'+'ile'='LOGOPHILE'
(Another definition for logophile that I've seen is " Lover of words".)