Briefly rouse guards or a maiden (3,1,6)

I believe the answer is:

for a moment

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

'briefly' is the definition.
(thesaurus)

'rouse guards or a maiden' is the wordplay.
I cannot really see how this works, but
'or' is present in the answer.
'a' is present in the answer.
'maiden' could be 'm' (cricket abbreviation) and 'm' is present in the answer.
The remaining letters 'foment' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Sunday Times.

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