Toboggan left inside plant (6)
I believe the answer is:
sledge
'toboggan' is the definition.
(I've seen this before)
'left inside plant' is the wordplay.
'left' becomes 'l' (common abbreviation).
'inside' indicates putting letters inside.
'plant' becomes 'sedge' (I can't justify this - if you can you should give a lot more credence to this answer).
'l' going inside 'sedge' is 'SLEDGE'.
Can you help me to learn more?
(Other definitions for sledge that I've seen before include "In the field, abuse" , "Narrow cart with runners for travelling on snow" , "Snow conveyance" , "Vehicle mounted on runners" , "Snow vehicle or heavy hammer" .)