To rise again, as if from the dead, tree surgeon must abandon note (7)

'to rise again' is the definition.
('surge' is an answer for 'to rise' so perhaps 'resurge' is OK for 'to rise again')

'tree surgeon must abandon note' is the wordplay.
'must abandon' indicates named letters should be taken away.
'tree'+'surgeon'='treesurgeon'
'treesurgeon' with 'note' removed is 'RESURGE'.

'as if from the dead' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?