Lorry that man used to carry fine plant (9)
I believe the answer is:
artichoke
'fine plant' is the definition.
'artichoke' can be an answer for 'plant' (I've seen this before). I'm unsure of the 'fine' bit.
'lorry that man used to carry' is the wordplay.
'lorry' becomes 'artic' (informal term for an articulated lorry).
'that man' becomes 'k' (abbreviation for king, a chess man).
'used' becomes 'hoe' (I can't justify this - if you can you should give a lot more credence to this answer).
'to carry' is an insertion indicator.
'k' inserted within 'hoe' is 'hoke'.
'artic'+'hoke'='ARTICHOKE'
Can you help me to learn more?
(Other definitions for artichoke that I've seen before include "globe, for example" , "Jerusalem, perhaps" , "Globe, perhaps" , "vegetable's served?" , "something often associated with Jerusalem" .)