Possible Clues:

• Express romantic interest in
• Request a date
• Start courting
• Invite to dinner, e.g
• Do you fancy a drink at quiz? It's general knowledge
• Most of those in 23 down and half of those in 21 down in court?
• Invite to the movies, say
• Invite to a movie, e.g
• Try to date report of one doing reconnaissance
• Invite to a movie, perhaps