Young creature, in garage largely at first, preferred to be outside (6)

I believe the answer is:
piglet
'young' is the definition.
(piglet is a kind of young)
'in garage largely at first preferred to be outside' is the wordplay.
'at first' suggests taking the first letters.
'preferred' becomes 'pet' (synonyms).
'to be outside' is an insertion indicator (some letters go outside others).
The initial letters of 'in garage largely' is 'igl'.
'igl' inserted inside 'pet' is 'PIGLET'.
'creature' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for piglet that I've seen before include "Small occupant of sty" , "Pooh's friend" , "19's little friend" , "Runt of the litter?" , "Young sow or boar" .)
