Philatelists collect them (6)

I believe the answer is:

stamps

'philatelists collect them' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for stamps that I've seen before include "Imprints" , "Brings one's foot down heavily on the envelope" , "Postal tokens" , "Philatelist's interest" , "Tramples" .)

I've seen this clue in The Irish Times.

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