Possible Clues:

• A large agitated rat caught by person in charge of bird
• Large marine bird
• Rare thing at golf club, right, during a defeat?
• Hindered by this floundering bird, oddly at a loss
• Awful brats also curse
• Three under obligation
• Big sea bird — there’s three fewer than expected on the green
• Cross Scotland, S Type fired up?
• Large southern hemisphere bird (which you don't want round your neck)
• Wandering bird?