Flower I call “exotic” (5)
I believe the answer is:
lilac
'flower' is the definition.
(thesaurus)
'i call exotic' is the wordplay.
'exotic' indicates anagramming the letters.
'i'+'call'='icall'
'icall' is an anagram of 'LILAC'.
(Other definitions for lilac that I've seen before include "Syringa vulgaris, light purple in colour" , "Flower celebrated by Schubert" , "Pale mauve colour for a flower" , "Mauve-like colour" , "Shade" .)