Sierra exactly right for carnivore (5)
I believe the answer is:
stoat
'carnivore' is the definition.
(stoat is a kind of carnivore)
'sierra exactly right' is the wordplay.
'sierra' becomes 's' (phonetic alphabet: alpha, bravo, charlie etc.).
'exactly right' becomes 'toat' (I've seen this before).
's'+'toat'='STOAT'
'for' acts as a link.
(Other definitions for stoat that I've seen before include "furry animal" , "Weasel, ermine" , "Short-tail weasel" , "Ermine in summertime?" , "Weasel-like mammal" .)