Bird to take illegally home (5)
I believe the answer is:
robin
'bird' is the definition.
(robin is a kind of bird)
'take illegally home' is the wordplay.
'take illegally' becomes 'rob' (robbing is a kind of taking illegally).
'home' becomes 'in' ('he's home' can mean 'he's in').
'rob'+'in'='ROBIN'
'to' is the link.
(Other definitions for robin that I've seen before include "boy" , "Bird - boy's name" , "See 12" , "Small songbird" , "Small brown and red bird" .)