Winger from Bristol set about on westbound tube (4,5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

definition: a species of bird, so a creature with wings TIT=”Bristol”; placed around/”set about” all of: RE=”on” + reversal/”westbound” of PIPE=”tube” “Bristol” is rhyming slang: ‘Bristol city’=’titty’