Struggled with foreign currency racket (10)
I believe the answer is:
battledore
'racket' is the definition.
(I've seen this before)
'struggled with foreign currency' is the wordplay.
'struggled' becomes 'battled' (battling is a kind of struggling).
'with' says to put letters next to each other.
'foreign currency' becomes 'ore' (I've seen this before).
'battled'+'ore'='BATTLEDORE'
(Other definitions for battledore that I've seen before include "Not much of a racket" , "game" , "Forerunner of Badminton" .)