Penny-pinching firm (5)
I believe the answer is:
tight
This clue is a double definition.
'penny-pinching' is the first definition.
(I've seen this before)
'firm' is the second definition.
(synonyms)
(Other definitions for tight that I've seen before include "Hard to move; drunk" , "unlikely to come loose" , "under the table" , "Unlikely to be choosing the present" , "Tense; drunk" .)