Hair product (3)
'hair product' is the definition.
(hair gel)
This is the entire clue.
(Other definitions for gel that I've seen before include "well-spoken deb?" , "Upstage" , "Viscid substance" , "Hair treatment" , "Leg it back to get some for your hair" .)
(Other definitions for shampoo that I've seen before include "Hair-cleansing agent" , "Top cleaning product" , "Soapy liquid for hair" , "Hair-cleaner" , "Cleaner for locks" .)
(Other definitions for conditioner that I've seen before include "Hair application" , "Shock treatment" , "Hair improver" .)
(Other definitions for rinse that I've seen before include "Wash in clean water" , "Hair tint" , "Run water through" , "Sluice" , "Use water to remove soap" .)