Rose also formed sprays (8)
I believe the answer is:
aerosols
'sprays' is the definition.
(I've seen this in another clue)
'rose also formed' is the wordplay.
'formed' indicates anagramming the letters.
'rose'+'also'='rosealso'
'rosealso' with letters rearranged gives 'AEROSOLS'.
(Other definitions for aerosols that I've seen before include "Sprays" , "They dispense substances in a fine spray" , "The dispensers release fine spray" , "Dispensers of substances in a fine spray" .)