Breaking into cash drawer briefly, aim right and shoot (7)
I believe the answer is:
tendril
'shoot' is the definition.
(a shoot from a plant)
'breaking into cash drawer briefly aim right' is the wordplay.
'breaking into' indicates putting letters inside.
'cash drawer' becomes 'till' (till can mean a cash register).
'briefly' means to remove the last letter.
'aim' becomes 'end' (both can mean a goal or purpose).
'right' becomes 'R' (common abbreviation).
'till' with its final letter removed is 'til'.
'end'+'r'='endr'
'til' going around 'endr' is 'TENDRIL'.
'and' acts as a link.
(Other definitions for tendril that I've seen before include "Plant's climbing aid" , "Stem by which climbing plant attaches itself" , "Plant's coiling, threadlike climbing organ" , "shoot to gain support" , "Slender thread-like appendage of a plant" .)