Lotion (8)
'lotion' is the definition.
(I know that liniment is a type of lotion)
This is all the clue.
(Other definitions for liniment that I've seen before include "Liquid for rubbing into skin" , "Embrocation" , "Medicinal liquid for the muscles" , "Lotion" , "application" .)
(Another definition for suntan that I've seen is " Bronze".)