The ram's turned into pet (7)
I believe the answer is:
hamster
'pet' is the definition.
(I've seen this before)
'the ram's turned' is the wordplay.
'turned' is an anagram indicator.
'the'+'rams'='therams'
'therams' anagrammed gives 'HAMSTER'.
'into' is the link.
(Other definitions for hamster that I've seen before include "Rodent often kept as pet" , "Short-tailed burrowing rodent" , "Pet rodent, may be golden" , "Animal" , "Little beast" .)