Call and follow possum (8)
I believe the answer is:
ringtail
'possum' is the definition.
(I've seen this before)
'call and follow' is the wordplay.
'call' becomes 'ring' (telephone call).
'and' is a charade indicator (letters next to each other).
'follow' becomes 'tail' (both can mean to chase or pursue).
'ring'+'tail'='RINGTAIL'
(Other definitions for ringtail that I've seen before include "creature" , "Sleepwalker" , "Possum" , "Sort of cat" , "Type of cat" .)