It has a bell end and gives pleasure if blown (7)
I believe the answer is:
trumpet
This clue is a double definition.
'it has a bell end' is the first definition.
'gives pleasure if blown' is the second definition.
'and' acts as a link.
(Other definitions for trumpet that I've seen before include "Proclaim loudly" , "Brass musical instrument" , "Metal wind instrument" , "brassy type" , "beastly noise" .)