Possible Clues:

• Sea patrol?
• Entry of player put on the bench, culminating in goal
• SOS minibus put out admitting defeat
• Giving up attack on surface ships, for example
• Undersea job?
• Possible voyage under the polar ice that's giving way
• Surrender of military expedition after advance
• Surrender — written contribution to enquiry etc
• Tender — surrender
• Proposal to end wrestling