Bear in pre-hibernation initially putting on weight (10)
I believe the answer is:
paddington
'bear' is the definition.
(Paddington Bear, character in children's books)
'pre-hibernation initially putting on weight' is the wordplay.
'pre-hibernation' becomes 'p' (this might be a standard abbreviation of which I'm unaware).
'initially' says to put letters next to each other (some letters go before others).
'putting on' becomes 'adding' (I've seen this in another clue).
'weight' becomes 'ton' (unit of weight).
'p'+'adding'+'ton'='PADDINGTON'
'in' is the link.
Can you help me to learn more?
(Other definitions for paddington that I've seen before include "London rail terminus" , "A figure child might want for Play" , "London station - famous bear" .)