Charge for plant (4)
I believe the answer is:
rush
I believe this is a double definition.
'charge' is the first definition.
(I've seen this before)
'plant' is the second definition.
(rush is a kind of plant)
'for' acts as a link.
(Other definitions for rush that I've seen before include "'Hurry, haste (4)'" , "Hurry to the grassy plant" , "Lose no time" , "Speed along - waterside plant" , "Sudden demand for product" .)