Enquirer understands only partly -- repeat (5)
I believe the answer is:
rerun
'repeat' is the definition.
(thesaurus)
'enquirer understands only partly' is the wordplay.
'only partly' says the answer is hidden in the clue.
'RERUN' can be found hidden inside 'enquirer understands'.
(Other definitions for rerun that I've seen before include "Show (eg, film) again" , "Programme shown again" , "rush again" , "Extra showing" , "Repeat programme" .)