Pull a string to get into "2" (5)
I believe the answer is:
heave
'pull' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for heave that I've seen before include "Produce (a sigh); lift" , "Tug-of-war shout" , "Be sick; rise and fall" , "Produce (a sigh); haul" , "Throw with force - retch" .)