Gather it might be beef, say (4)
I believe the answer is:
meet
'gather' is the definition.
(I know that meet is a kind of gather)
'beef say' is the wordplay.
'beef' becomes 'meat' (I've seen this in another clue).
'say' shows a homophone (sound like).
'meat' is a homophone of 'MEET'.
'it might be' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for meet that I've seen before include "It is proper to encounter" , "sporting occasion" , "Fitting to come together" , "Happen upon" , "Sporting encounter" .)