Heard indistinct bluster coming from the swaggie (7)
I believe the answer is:
vagrant
'heard' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I can't see?
'indistinct bluster coming from the swaggie' is the wordplay.
I cannot really see how this works, but
'bluster' could be 'rant' (I've seen this in another clue) and 'rant' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for vagrant that I've seen before include "Homeless wanderer" , "Unsettled person, a tramp" , "nomadic type" , "Traveller" , "Beggar" .)