Terribly cool cinema saving money (10)
I believe the answer is:
economical
'saving money' is the definition.
(I've seen this before)
'terribly cool cinema' is the wordplay.
'terribly' indicates an anagram.
'cool'+'cinema'='coolcinema'
'coolcinema' with letters rearranged gives 'ECONOMICAL'.
(Other definitions for economical that I've seen before include "Providing good value" , "Inexpensive" , "Reasonable" , "Giving good value for money" , "Cheap" .)