It doesn't take many to start feuding, we're told (3)
I believe the answer is:
few
'it doesn't take many' is the definition.
The definition suggests a singular noun which matches the answer.
'start feuding we're told' is the wordplay.
'start' indicates taking the first letters.
'we're told' becomes 'ew' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'feuding' is 'f'.
'f'+'ew'='FEW'
'to' is the link.
Can you help me to learn more?
(Other definitions for few that I've seen before include "'''Many are called but ... are chosen'' (Bible) (3)'" , "Indefinite but small number" , "Relatively small number" , "Considerable number, ironically" , "Indefinite small amount" .)