What to take for one's pains, being upset about the tax people (7)
I believe the answer is:
aspirin
'what to take for one's' is the definition.
I can't tell whether this defines the answer.
'pains being upset about the tax people' is the wordplay.
'being upset' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'the tax people' becomes 'IR' (abbreviation for Inland Revenue).
'pains' with letters rearranged gives 'aspin'.
'aspin' enclosing 'ir' is 'ASPIRIN'.
Can you help me to learn more?
(Other definitions for aspirin that I've seen before include "Pain-relief drug" , "Anti-inflammatory analgesic" , "Pain-relieving drug made in Paris" , "Headache killer?" , "answer to pain?" .)