Arrived and left an animal (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 mean to appear or arrive).
'and' is a charade indicator (letters next to each other).
'left' becomes 'l' (common abbreviation).
'came'+'l'='CAMEL'
'an' acts as a link.
(Other definitions for camel that I've seen before include "Saddle animal in desert regions" , "Old WWI plane" , "Humped ungulate" , "It is called the ship of the desert" , "Desert ruminant" .)