Rug tint one introduced to rugged European? (4,3)
I believe the answer is:
hair dye
'rug tint' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'one introduced to rugged european?' is the wordplay.
'one' becomes 'i' (Roman numeral).
'introduced to' is an insertion indicator.
'rugged' becomes 'hardy' (similar in meaning).
'european?' becomes 'E' (abbreviation e.g. EU).
'i' placed inside 'hardy' is 'hairdy'.
'hairdy'+'e'='HAIR DYE'
Can you help me to learn more?
(Another definition for hair dye that I've seen is " means to change the locks".)