British worker with a male fowl (6)
I believe the answer is:
bantam
'fowl' is the definition.
(bantam is a kind of fowl)
'british worker with a male' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'worker' becomes 'ant' (worker is a type of ant).
'with' says to put letters next to each other.
'male' becomes 'm' (common abbreviation).
'b'+'ant'+'a'+'m'='BANTAM'
(Other definitions for bantam that I've seen before include "aggressive little sort" , "Lightweight boxer and chicken" , "Dwarf variety of domestic fowl" , "Small chicken - small soldier" , "Little clucker" .)