Light entertainment to repeat all over the place (8)
I believe the answer is:
operetta
'light entertainment' is the definition.
(I've seen this before)
'to repeat all over the place' is the wordplay.
'all over the place' indicates anagramming the letters.
'to'+'repeat'='torepeat'
'torepeat' is an anagram of 'OPERETTA'.
(Other definitions for operetta that I've seen before include "Eg, Die Fledermaus" , "Light musical stage work" , "Light musical theatre" , "The Student Prince, for example" , "Show" .)