After that, catch about ten (4)

I believe the answer is:

'after that' is the definition.

'catch about ten' is the wordplay.
'catch' becomes 'net' (netting is a kind of catching).
'about' is an insertion indicator.
'ten' becomes 'x' (roman numeral).
'net' enclosing 'x' is 'NEXT'.

(Other definitions for next that I've seen before include "Immediately afterwards" , "Coming nearest in order - come, please!" , "Nearest following" , "shop" , "Soonest encountered" .)

I've seen this clue in the Evening Standard.

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