Possible Clues:

• Partridge family member
• Ring-necked bird
• Neat chaps possibly caught leaving some game
• SECOND PART OF 27
• Rustic grabbing head of huge bird
• A hen's apt to be mistaken for a game bird
• Bird served "under glass"
• Game that's agreeable but hard for learner
• Richly-coloured game-bird
• Game that's hard for rustic to grasp