To males, one represents danger (6)
I believe the answer is:
menace
'danger' is the definition.
(menace is a kind of danger)
'to males one' is the wordplay.
'to males' becomes 'men' (man is a kind of male).
'one' becomes 'ace' ('ace' can be a synonym of 'one').
'men'+'ace'='MENACE'
'represents' is the link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for menace that I've seen before include "Harmful person" , "Threat; threaten" , "ominous atmosphere" , "A source of danger" , "serious nuisance" .)