Father with new alluring woman (5)
I believe the answer is:
siren
'alluring woman' is the definition.
(I've seen this in another clue)
'father with new' is the wordplay.
'father' becomes 'sire' (synonyms).
'with' says to put letters next to each other.
'new' becomes 'n' (abbreviation as in New Testament NT).
'sire'+'n'='SIREN'
(Other definitions for siren that I've seen before include "Warning device, alluring woman" , "Seductress" , "Device making a loud wailing sound" , "Loud whistle for sea temptress" , "Seductive woman" .)