Crossword Genius

A number turning up in trap (3)

Ross

I believe the answer is:

net

'trap' is the definition.
(net is a type of trap)

'a number turning up' is the wordplay.
'a number' becomes 'ten' (ten is a number).
'turning up' shows that the letters should be reversed in order.
'ten' backwards is 'NET'.

'in' acts as a link.

(Other definitions for net that I've seen before include "Fish trap and type of goal" , "catch fish" , "Open-meshed fabric" , "Fine open-weave fabric" , "Lattice" .)

I've seen this clue in The Times.
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