Tailor to repeat light work (8)
I believe the answer is:
operetta
'light work' is the definition.
(I've seen this before)
'tailor to repeat' is the wordplay.
'tailor' indicates anagramming the letters (letters tailored or designed).
'to'+'repeat'='torepeat'
'torepeat' with letters rearranged gives 'OPERETTA'.
(Other definitions for operetta that I've seen before include "Light musical stage work" , "The Mikado, e.g." , "HMS Pinafore or The Yeomen of the Guard" , "Make short work" , "Short musical drama" .)