One comic, nasty and 'cheap' (8)
I believe the answer is:
economic
'cheap' is the definition.
(I've seen this before)
'one comic nasty' is the wordplay.
'nasty' is an anagram indicator.
'one'+'comic'='onecomic'
'onecomic' anagrammed gives 'ECONOMIC'.
'and' acts as a link.
(Other definitions for economic that I've seen before include "Relating ot the management of wealth" , "system of money" , "Relating to the circulation of money" , "Monetary; cost-effective" , "Fiscal" .)