Serve us a soda with egg for the dachshund (7,3)
I believe the answer is:
sausage dog
'the dachshund' is the definition.
(sausage dog is a kind of dachshund)
'serve us a soda with egg' is the wordplay.
'serve' indicates anagramming the letters (I've seen 'serving' mean this).
'with' is a charade indicator (letters next to each other).
'us'+'a'+'soda'='usasoda'
'usasoda' after 'egg' is 'eggusasoda'.
'eggusasoda' is an anagram of 'SAUSAGE-DOG'.
'for' is the link.
(Other definitions for sausage dog that I've seen before include "Dachshund (colloq.)" , "At a stretch, a pet" .)