A new tax brings feeling of unease (5)
I believe the answer is:
angst
'feeling of unease' is the definition.
'angst' can be an answer for 'unease' (I've seen this in another clue). I am unsure of the 'feeling of' bit.
'a new tax' is the wordplay.
'a' becomes 'an'.
'new tax' becomes 'gst' (I can't explain this - if you can you should give a lot more credence to this answer).
'an'+'gst'='ANGST'
'brings' is the link.
Can you help me to learn more?
(Other definitions for angst that I've seen before include "Philosophical unease" , "General feeling of dread" , "Gnats (anag.)" , "Stang (anag)" , "Acute but unspecified feeling of worry" .)