Typecast in play, initially hope for change (5,4)
I believe the answer is:
petty cash
'change' is the definition.
(thesaurus)
'typecast in play initially hope' is the wordplay.
'in play' is an anagram indicator.
'initially' suggests taking the first letters.
The first letter of 'hope' is 'h'.
'typecast' anagrammed gives 'pettycas'.
'pettycas'+'h'='PETTY CASH'
'for' is the link.
(Other definitions for petty cash that I've seen before include "Small amounts of money set aside for insignificant payments" , "Small fund for minor expenses" , "money kept for small expenses" , "Money for expenditure on small items" , "till content)?" .)