Possible Clues:

• Fish rested having crossed quiet river
• 'Set a . . . . . to catch a whale'
• Traps wild fish
• Throw canvas sheets briefly over fish
• Fish in foreign parts
• Pair during first half of weekend shortly had fish
• Parts (anag.)
• Herring's smaller relative
• Dispute about right to get fish
• Jack who ate no fat, in a nursery rhyme