Light entertainment to repeat, perhaps (8)
I believe the answer is:
operetta
'light entertainment' is the definition.
(I've seen this before)
'to repeat perhaps' is the wordplay.
'perhaps' indicates an anagram.
'to'+'repeat'='torepeat'
'torepeat' with letters rearranged gives 'OPERETTA'.
(Other definitions for operetta that I've seen before include "Eg, The Gondoliers" , "Make short work" , "The Student Prince, for example" , "The Mikado, e.g." , "piece of music?" .)