Various things about dispute may be sources of pain (9)

I believe the answer is:

ingrowths

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'be sources of pain' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'various things about dispute' is the wordplay.
'various' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'dispute' becomes 'row' (row is a kind of dispute).
'things' is an anagram of 'ingths'.
'ingths' placed around 'row' is 'INGROWTHS'.

'may' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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