Trees burning in Hampshire town (9)
I believe the answer is:
aldershot
'hampshire town' is the definition.
(I've seen this before)
'trees burning' is the wordplay.
'trees' becomes 'alders' (alder is a kind of tree**).
'burning' becomes 'hot' ('hot' can be similar in meaning to 'burning').
'alders'+'hot'='ALDERSHOT'
'in' is the link.
(Other definitions for aldershot that I've seen before include "Home of the British Army" , "Hampshire army town" , "town occupied by soldiers?" , "Hampshire military base" , "In army camp" .)