Break and pull on plant (10)
I believe the answer is:
snapdragon
'plant' is the definition.
(snapdragon is a kind of plant)
'break and pull on' is the wordplay.
'break' becomes 'snap' (snapping is a kind of breaking).
'and' says to put letters next to each other.
'pull' becomes 'drag' (dragging is a kind of pulling).
'snap'+'drag'+'on'='SNAPDRAGON'
(Other definitions for snapdragon that I've seen before include "one found in bed" , "One blooming" , "Garden plant" , "Kind of antirrhinum" , "that's in the garden?" .)