Dispute in fee fund, every so often (4)
I believe the answer is:
feud
'dispute' is the definition.
(I know that feud is a type of dispute)
'fee fund every so often' is the wordplay.
'every so often' indicates alternate letters.
'fee'+'fund'='feefund'
The alternate letters of 'feefund' are 'FEUD'.
'in' is the link.
(Other definitions for feud that I've seen before include "Sustained enmity" , "Lasting hostility between people or groups" , "quarrel without end" , "Long-running dispute" , "Prolonged fight between families, very Sicilian" .)