Pinch money found in dumpster (5)
I believe the answer is:
skimp
'pinch' is the definition.
(thesaurus)
'money found in dumpster' is the wordplay.
'money' becomes 'm' (abbreviation in economics).
'found in' means one lot of letters goes inside another.
'dumpster' becomes 'skip' (I've seen this before).
'm' placed into 'skip' is 'SKIMP'.
(Other definitions for skimp that I've seen before include "Try to economise" , "Spend not enough time and care on (job)" , "Cut back on resources" , "Work hastily" , "Cut corners" .)