What fielder tries to do for contract (5)

I believe the answer is:

catch

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'for contract' is the definition.
(to catch an illness is to contract it)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for catch that I've seen before include "problem in small print?" , "Dismiss (batsman); break (in voice)" , "Desirable partner" , "Get a grip on" , "Apprehend - drawback" .)

I've seen this clue in The Telegraph.

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