Pam struggles in some current (3)
I believe the answer is:
amp
'some current' is the definition.
(unit of electrical current)
'pam struggles' is the wordplay.
'struggles' is an anagram indicator.
'pam' is an anagram of 'AMP'.
'in' is the link.
(Other definitions for amp that I've seen before include "Sound booster" , "A flow of one coulomb per second" , "Physics unit" , "Map of electrical unit" , "Certain amount of power" .)