Conspicuous, striking (7)
I believe the answer is:
salient
I believe this clue is a double definition.
'conspicuous' is the first definition.
(similar in meaning)
'striking' is the second definition.
(synonyms)
(Other definitions for salient that I've seen before include "Leaping (heraldry)" , "Entails (anag) - most important" , "Outstanding - it's lean (anag)" , "Prominent - in tales (anag)" , "Entails being most noticeable" .)