Spare, one gathers? (5)

I believe the answer is:

reaps

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'spare one gathers?' is the definition.
'reaps' can be an answer for 'gathers?' (I've seen this in another clue). I am not sure about the 'spare one' bit.

'spare one gathers?' is the wordplay.
'one gathers?' is an anagram indicator (I've seen 'gathered' mean this).
'spare' anagrammed gives 'REAPS'.

Can you help me to learn more?

(Other definitions for reaps that I've seen before include "Gleans or harvests" , "Harvests with strange spear" , "Harvests (a crop)" , "Cuts, gathers grain" , "crops" .)

I've seen this clue in the Evening Standard.

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