Pam struggled in some current (3)
I believe the answer is:
amp
'some current' is the definition.
(electricity)
'pam struggled' is the wordplay.
'struggled' indicates anagramming the letters (I've seen 'struggles' mean this).
'pam' is an anagram of 'AMP'.
'in' is the link.
(Other definitions for amp that I've seen before include "Map of electrical unit" , "Map of electric current" , "It helps you hear" , "Sound booster" , "Current measure" .)