Struggle to find the right rhyme (5)

I believe the answer is:

fight

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

'struggle' is the definition.
(I know that struggle can be written as fight)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for fight that I've seen before include "Brawl; argue" , "Attack or engage in combat" , "Strive - struggle" , "Come to blows" , "Scrap" .)

I've seen this clue in the Evening Standard.

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