Animal arrived and left (5)
I believe the answer is:
camel
'animal' is the definition.
(I've seen this before)
'arrived and left' is the wordplay.
'arrived' becomes 'came' ('come' can be a synonym of 'arrive').
'and' is a charade indicator (letters next to each other).
'left' becomes 'L' (common abbreviation).
'came'+'l'='CAMEL'
(Other definitions for camel that I've seen before include "African carrier" , "Humped mammal" , "Humped ungulate" , "One travelling in caravan" , "Cud-chewing mammal of desert regions" .)