Peruvian perhaps fat, with a lot of weight to carry (10,4)
I believe the answer is:
paddington bear
'peruvian' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'perhaps fat with a lot of weight to carry' is the wordplay.
'perhaps fat' becomes 'padding' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' means one lot of letters go next to another.
'a lot of weight' becomes 'ton' (unit of weight).
'to carry' becomes 'bear' (bear can mean to transport or carry).
'padding'+'ton'+'bear'='PADDINGTON BEAR'
Can you help me to learn more?
(Other definitions for paddington bear that I've seen before include "Cuddly character" , "Original character from Peru" , "Michael Bond's children's one across" , "is what some children love" , "Children's favourite" .)