Cheap comic? One's funny (8)
I believe the answer is:
economic
'cheap' is the definition.
(I've seen this before)
'comic? one's funny' is the wordplay.
'funny' is an anagram indicator.
'comic'+'one'='comicone'
'comicone' is an anagram of 'ECONOMIC'.
(Other definitions for economic that I've seen before include "Likely to bring a profit" , "Fiscal" , "Cheap" , "Inexpensive" , "One comic (anag)" .)