They help the band - In a way that is (7)
I believe the answer is:
roadies
'they' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'help the band in a way that is' is the wordplay.
'help the band' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'in' is an insertion indicator.
'a way' becomes 'road' (road is a kind of way).
'that is' becomes 'is'.
'road'+'is'='roadis'
'e' going into 'roadis' is 'ROADIES'.
Can you help me to learn more?
(Other definitions for roadies that I've seen before include "Transport managers" , "They handle the equipment for entertainers" , "Pop group's tour assistants" , "Band tour crew" .)