Programme cost I’m working out (6)
I believe the answer is:
sitcom
'programme' is the definition.
(sitcom is a kind of programme)
'cost i'm working out' is the wordplay.
'working out' is an anagram indicator (an anagram must be worked out from the letters).
'cost'+'im'='costim'
'costim' anagrammed gives 'SITCOM'.
(Other definitions for sitcom that I've seen before include "Light-hearted TV series" , "Episodical TV programme" , "Friends perhaps" , "Form of TV comedy" , "Type of comedy show" .)