Curious cat with smile seeing plant (8)
I believe the answer is:
clematis
'plant' is the definition.
(type of plant)
'curious cat with smile' is the wordplay.
'curious' indicates anagramming the letters.
'with' says to put letters next to each other.
'cat'+'smile'='catsmile'
'catsmile' is an anagram of 'CLEMATIS'.
'seeing' is the link.
(Other definitions for clematis that I've seen before include "Old man's beard" , "Where man meets machine" , "Climates (anag)" , "Buttercup relative" , "traveller's joy" .)