Possible Clues:

• Officially due to take part in a match?
• Romantically committed � having good time, in conclusion
• Absorbed
• Hired and intending to join union
• Sweethearts may get it, having grand time in consequence
• Put in the post as promised
• Ringed but not ringing
• Committed to complete wearing a glove
• Not vacant, waiting for the match?
• Listening, say