Last word from alpha males (4)
I believe the answer is:
amen
'last word' is the definition.
(last word in a prayer)
'alpha males' is the wordplay.
'alpha' becomes 'a' (phonetic alphabet: alpha, bravo, charlie etc.).
'males' becomes 'men' (man is a kind of male).
'a'+'men'='AMEN'
'from' acts as a link.
(Other definitions for amen that I've seen before include "Conclusion of prayer" , "Word of agreement" , "Extremist" , "Put name to end of payer" , "Prayerful last word" .)