Bag present for fan (6)

I believe the answer is:

winnow

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'for fan' is the definition.
(synonyms)

'bag present' is the wordplay.
'bag' becomes 'win' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'present' becomes 'now' (both can mean the current period).
'win'+'now'='WINNOW'

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(Other definitions for winnow that I've seen before include "Sift out" , "Fan" , "Separate the wheat from the chaff" , "Dehusk grain using air currents" , "Separate chaff from grain" .)

I've seen this clue in The Irish Times.

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