Slurs like folk drinking drop of IPA (10)

I believe the answer is:

aspersions

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'slurs' is the definition.
('aspersion' can be a synonym of 'slur')

'like folk drinking drop of ipa' is the wordplay.
'like' becomes 'as'.
'folk' becomes 'persons' (I can't justify this - if you can you should give a lot more credence to this answer).
'drinking' means one lot of letters goes inside another.
'drop of' suggests taking the first letters.
The first letter of 'ipa' is 'i'.
'persons' going around 'i' is 'persions'.
'as'+'persions'='ASPERSIONS'

Can you help me to learn more?

(Other definitions for aspersions that I've seen before include "slanderous accusations" , "Slanders" , "derogatory remarks" .)

I've seen this clue in The Sunday Times.

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