Bloke on Scottish isle briefly left thicket of brushwood (9)
I believe the answer is:
chaparral
'thicket of brushwood' is the definition.
(chaparral means tangled bushes)
'bloke on scottish isle briefly left' is the wordplay.
'bloke on' becomes 'chap' (I can't justify this - if you can you should give a lot more credence to this answer).
'scottish isle' becomes 'arran' (island off Scottish coast).
'briefly' means to remove the last letter.
'left' becomes 'l' (common abbreviation).
'arran' with its final letter taken away is 'arra'.
'chap'+'arra'+'l'='CHAPARRAL'
Can you help me to learn more?
(Other definitions for chaparral that I've seen before include "US growth area" , "thicket" .)