Winter transport left in plant (6)
I believe the answer is:
sledge
'winter transport' is the definition.
'sledge' can be an answer for 'transport' (sledge is a kind of transport). I'm not sure about the 'winter' bit.
'left in plant' is the wordplay.
'left' becomes 'l' (common abbreviation).
'in' indicates putting letters inside.
'plant' becomes 'sedge' (sedge is a plant).
'l' going into 'sedge' is 'SLEDGE'.
Can you help me to learn more?
(Other definitions for sledge that I've seen before include "Heavy long-handled hammer" , "In Canada train" , "heavy tool" , "Transport on snow - hammer" , "Snow conveyance" .)