Pet in the arms perhaps (7)
I believe the answer is:
hamster
'pet' is the definition.
(I've seen this before)
'the arms perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'the'+'arms'='thearms'
'thearms' with letters rearranged gives 'HAMSTER'.
'in' is the link.
(Other definitions for hamster that I've seen before include "Little beast" , "one running round in circles?" , "Rodent often kept as pet" , "Kind of rodent with cheekpouches, often a pet" , "Rodent with large cheek pouches" .)