Opposed to mercantilism at heart (4)

I believe the answer is:

anti

'opposed to' is the definition.
(anti means opposing something)

'mercantilism at heart' is the wordplay.
'at heart' indicates a hidden word (letters hidden in the heart of the clue).
'ANTI' is hidden in the letters of 'mercantilism'.

(Other definitions for anti that I've seen before include "Not favouring" , "Someone opposed (to a policy?)" , "Opposition member" , "Who pooh-poohs all" , "One who is against (something)" .)

I've seen this clue in The Irish Times.

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