Awful blue rinse in spray (9)
I believe the answer is:
nebuliser
'spray' is the definition.
(I've seen this before)
'awful blue rinse' is the wordplay.
'awful' indicates an anagram.
'blue'+'rinse'='bluerinse'
'bluerinse' with letters rearranged gives 'NEBULISER'.
'in' is the link.
(Other definitions for nebuliser that I've seen before include "Drug delivery system" , "Used to inhale the drug" , "Device for producing a fine spray, for inhaling a medicinal drug, say" , "Spray - blue rinse (anag)" , "dispensed by this" .)