Enthusiasm keeps injured one in battle (2,7)
I believe the answer is:
el alamein
'battle' is the definition.
(Second World War battle)
'enthusiasm keeps injured one in' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is located in the answer.
'in' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for el alamein that I've seen before include "North African WW2 battle site" , "WWII battle" , "victory" , "North African World War two battle" , "Place in Egypt where Montgomery defeated Rommel" .)