...understanding some indecent entertainment (7)
I believe the answer is:
entente
'understanding' is the definition.
(entente is a kind of understanding)
'some indecent entertainment' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'ENTENTE' can be found hidden inside 'indecent entertainment'.
(Other definitions for entente that I've seen before include "Harmony" , "Agreement between governments" , "Friendly agreement between countries" , "Political agreement" , "A friendly underatanding between countries, may be cordiale" .)