Crossword Genius

Someone to fight for the key to the office (3)

Ross

I believe the answer is:

foe

I'm a little stuck... Click here to teach me more about this clue!

'someone' is the definition.
(foe is a kind of someone)

'fight for the key to the office' is the wordplay.
I cannot really understand how this works, but
'key' could be 'f' (I've seen this in other clues) and 'f' is found within the answer.
The remaining letters 'oe' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).

'to' acts as a link.

Can you help me to learn more?

(Other definitions for foe that I've seen before include "Someone opposing" , "Am archaic enemy" , "Opposition" , "Adversary" , "friend never!" .)

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