Related Clues:

• Flyer's energy starts to dwindle with increased travel
• Wader's good sense on westward track
• The man upstairs gets insight from a long-legged bird
• Large wading bird, like a curlew — two dig (anag)
• Rounding first of defenders, briefly follow winger
• Shore bird raised tail, having intelligence
• Bird, the reverse of animal with intelligence
• Show gusto around duke, wife and migrant