Possible Clues:

• Two-legged meat source
• One unable to fly, being stuck in the mud
• Financial programme that will never take off
• Nonflyer of Australia
• Australian runner in team, sub regularly used
• 'If the bird gets late, copy it (3)'
• Bird with meat high in protein
• Flightless bird from Down Under
• Brown-feathered bird
• Australian bird with no lift