Related Clues:

• Take the bait?
• Parting request
• Trawl
• Use a pen
• Easy mark, in cards
• Seek at random, with 'for'
• Word to add to each theme answer that will make sense of its clue
• Aquatic creature
• Correspondent's request
• Marlin or mackerel
• Keep in touch
• Jot (down)
• Sneakily probe (for)
• Aquatic fly?
• Follower of angel or devil