Pudding poorly cooked, left by everybody ultimately (4-4)
I believe the answer is:
roly-poly
'pudding' is the definition.
(roly-poly is a kind of pudding)
'poorly cooked left by everybody ultimately' is the subsidiary indication.
'cooked' indicates an anagram.
'left' becomes 'l' (common abbreviation**).
'by' means one lot of letters go next to another.
'ultimately' indicates one should take the final letters.
The final letter of 'everybody' is 'y'.
'poorly' anagrammed gives 'rolypo'.
'rolypo'+'l'+'y'='rolypoly'
(Other definitions for roly-poly that I've seen before include "Plump - rotund - pudding" , "Plump in appearance- steamed pudding" , "Substantial" , "Plump and round" , "Short and plump" .)