Flowering plant: leave it to revert, surrounded by a lot of wood (7)

'lot of wood' is the definition.
The definition suggests a singular noun which matches the answer.

'flowering plant leave it to revert surrounded by a' is the wordplay.
I cannot really understand how this works, but
'leave' could be 'go' (to go is to depart or leave) and 'go' is present in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
'a' is within the answer.
The remaining letters 'dei' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?