Pull gag (5)

I believe the answer is:

heave

This clue is a double definition.

'pull' is the first definition.
(thesaurus)

'gag' is the second definition.
('heave' can be a synonym of 'gag')

(Other definitions for heave that I've seen before include "Tug-of-war cry" , "Produce (a sigh); haul" , "Big effort" , "Produce (a sigh); retch" , "Be sick; rise and fall" .)

I've seen this clue in The Guardian.

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