Point to small pudding or potato (4)
I believe the answer is:
spud
'potato' is the definition.
(spud can informally mean potato)
'point to small pudding' is the wordplay.
'point' becomes 'S' (South).
'to small pudding' becomes 'pud' (synonyms; 'small' suggests a short form).
's'+'pud'='SPUD'
'or' acts as a link.
(Other definitions for spud that I've seen before include "one's eyed" , "Murphy" , "King Edward, say (slang)" , "Potato (informal)" , "Starchy bit of food" .)