Member in dailies every so often making claim (6)
I believe the answer is:
allege
'claim' is the definition.
(to allege something is to make a claim)
'member in dailies every so often' is the wordplay.
'member' becomes 'leg' (member can mean a limb).
'in' means one lot of letters goes inside another.
'every so often' means one should take alternating letters.
The alternating letters of 'dailies' are 'ale'.
'leg' put into 'ale' is 'ALLEGE'.
'making' acts as a link.
(Other definitions for allege that I've seen before include "Declare without actual proof" , "Claim (a person is guilty)" , "Make a claim without proof" , "Make accusation without proof" , "Declare without being able to prove" .)