As a guess, mash and what it often accompanies (8)
I believe the answer is:
sausages
'what it often accompanies' is the definition.
I can't tell whether this definition defines the answer.
'as a guess mash' is the wordplay.
'mash' indicates an anagram (letters mashed up).
'as'+'a'+'guess'='asaguess'
'asaguess' with letters rearranged gives 'SAUSAGES'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for sausages that I've seen before include "Minced seasoned meat stuffed in tubes" , "They may be eaten" , "Bangers" , "eg Hot-dogs" , "Minced meat stuffed in casings" .)