Debtor stuffing pennies into faulty socket (5,5)
I believe the answer is:
power point
'socket' is the definition.
(I've seen this before)
'debtor stuffing pennies into faulty' is the wordplay.
'debtor' becomes 'ower' (I've seen this in another clue).
'stuffing' means one lot of letters goes inside another.
'pennies' becomes 'pp' (an abbreviation for penny written twice).
'faulty' is an anagram indicator.
'ower' inserted inside 'pp' is 'powerp'.
'into' with letters rearranged gives 'oint'.
'powerp'+'oint'='POWER-POINT'
(Other definitions for power point that I've seen before include "socket" , "Source of energy" .)