Band transported tonne (5)
I believe the answer is:
nonet
'band' is the definition.
(I have seen 'small band' mean 'nonet' so perhaps 'band' could also mean 'nonet')
'transported tonne' is the wordplay.
'transported' indicates an anagram.
'tonne' with letters rearranged gives 'NONET'.
(Other definitions for nonet that I've seen before include "Piece for nine players" , "Group of singers" , "Musical composition -- tonne (anag)" , "Band's" , "Composition for nine voices" .)