Band from Stoke essentially unchanged (5)
I believe the answer is:
oasis
'band' is the definition.
(I have seen 'British band' mean 'oasis' so perhaps 'band' could also mean 'oasis')
'stoke essentially unchanged' is the wordplay.
'essentially' says to take the centre.
'unchanged' becomes 'asis' (I've seen this before).
The middle of 'stoke' is 'o'.
'o'+'asis'='OASIS'
'from' is the link.
(Other definitions for oasis that I've seen before include "quiet spot" , "Place of rest in the midst of gloom" , "water you'll want here" , "Florist's foam" , "flower arranging stuff" .)