Escort our party with that woman (5)
I believe the answer is:
usher
'escort' is the definition.
(I know that usher is a type of escort)
'our party with that woman' is the wordplay.
'our party' becomes 'us' (our group).
'with' says to put letters next to each other.
'that woman' becomes 'her' (her refers to a woman).
'us'+'her'='USHER'
(Other definitions for usher that I've seen before include "Show (in or out); doorkeeper" , "Person whose job is to conduct others" , "Theatre attendant" , "Old teacher" , "Helper at wedding" .)