Porter airs problem to one of those immune to dust (10)
I believe the answer is:
respirator
'one of those immune to dust' is the definition.
I can't judge whether this definition defines the answer.
'porter airs problem' is the wordplay.
'problem' indicates anagramming the letters.
'porter'+'airs'='porterairs'
'porterairs' with letters rearranged gives 'RESPIRATOR'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for respirator that I've seen before include "Breathing aid" , "protective equipment" , "Supplier of clean gas" , "breather" , "Breathing apparatus" .)