Bed lad made up in bag for pig (10)
I believe the answer is:
saddleback
'pig' is the definition.
(I've seen this before)
'bed lad made up in bag' is the wordplay.
'made up' indicates an anagram.
'in' indicates putting letters inside.
'bag' becomes 'sack' (sack is a kind of bag**).
'bed'+'lad'='bedlad'
'bedlad' with letters rearranged gives 'addleb'.
'addleb' going within 'sack' is 'SADDLEBACK'.
'for' is the link.
(Other definitions for saddleback that I've seen before include "Farm animal" , "Hill" , "Breed of pig" .)