It's a relic, strangely lifelike (9)
I believe the answer is:
realistic
'lifelike' is the definition.
(similar in meaning)
'it's a relic strangely' is the wordplay.
'strangely' is an anagram indicator.
'its'+'a'+'relic'='itsarelic'
'itsarelic' is an anagram of 'REALISTIC'.
(Other definitions for realistic that I've seen before include "It is clear (anag)" , "Faithful" , "Objective" , "true-to-life" , "It is clear, being practical and sensible" .)