Links might be crude, say (6)
I believe the answer is:
course
'links' is the definition.
(I've seen this in another clue)
'crude say' is the wordplay.
'crude' becomes 'coarse' (synonyms).
'say' shows a homophone (sound like).
'coarse' is a homophone of 'COURSE'.
'might be' acts as a link.
(Other definitions for course that I've seen before include "Route of the race" , "Source (anag.)" , "Path of a river or a set of lessons" , "Direction; lecture series" , "Route along which something travels" .)