Smashed head of suction hose (6)
I believe the answer is:
tights
'hose' is the definition.
(I know that tights is a type of hose)
'smashed head of suction' is the wordplay.
'smashed' becomes 'tight' (synonyms).
'head of' suggests taking the first letters.
The first letter of 'suction' is 's'.
'tight'+'s'='TIGHTS'
(Other definitions for tights that I've seen before include "Film '25: Men in --'" , "form of legwear" , "Leg garment" , "Leg-wear for women" , "Hose worn by dancers" .)