Dog tucking right into food (5)
I believe the answer is:
track
'dog' is the definition.
(I know that dog can be written as track)
'right into food' is the wordplay.
'right' becomes 'r' (common abbreviation).
'into' indicates putting letters inside.
'food' becomes 'tack' (informal term for food).
'r' inserted within 'tack' is 'TRACK'.
'tucking' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for track that I've seen before include "One song on CD?" , "song off a record" , "Lines" , "Path; rails; circuit" , "One of the songs on CD?" .)