Pam struggled in some current (3)

I believe the answer is:

amp

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'some current' is the definition.
(electricity)

'pam struggled' is the wordplay.
'pam' anagrams to 'AMP'.
Though, I am not sure how the anagram is indicated.

'in' acts as a link.

Can you help me to learn more?

(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" .)

I've seen this clue in The Mirror.

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