Current measures introduced as money problems snowball (4)
I believe the answer is:
amps
'current measures' is the definition.
(units of electrical current)
'introduced as money problems snowball' is the wordplay.
'introduced' suggests taking the first letters.
The initial letters of 'as money problems snowball' is 'AMPS'.
(Other definitions for amps that I've seen before include "Spam (anag)" , "Current measures" , "concert gear" , "Units of electrical power" , "'Units of electric current, in short (4)'" .)