Crossword Genius

Attack, finding nothing in fight (5)

Ross

I believe the answer is:

foray

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

'attack' is the definition.
(I've seen this before)

'finding nothing in fight' is the wordplay.
'finding nothing' becomes 'o' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'fight' becomes 'fray' (fray is a kind of fight).
'o' going into 'fray' is 'FORAY'.

Can you help me to learn more?

(Other definitions for foray that I've seen before include "Brief incursion" , "Assault" , "Raid into enemy territory" , "Depredation" , ".A sudden attack or raid" .)

I've seen this clue in The Telegraph.
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