A little regular cash kept economy moving (6,5)
I believe the answer is:
pocket money
'a little regular cash' is the definition.
'pocket money' can be an answer for 'cash' (pocket money is a kind of cash). I am not certain of the 'a little regular' bit.
'kept economy moving' is the wordplay.
'moving' is an anagram indicator (letters are moved around).
'kept'+'economy'='kepteconomy'
'kepteconomy' with letters rearranged gives 'POCKET-MONEY'.
Can you help me to learn more?
(Other definitions for pocket money that I've seen before include "Child's allowance" , "Cash spent on sweets and crisps?" .)