Spreading widely, pain vexes drunk (9)

I believe the answer is:

expansive

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'spreading widely' is the definition.
'expansive' can be an answer for 'spreading' (thesaurus). I'm unsure of the 'widely' bit.

'pain vexes drunk' is the wordplay.
'drunk' indicates an anagram.
'pain'+'vexes'='painvexes'
'painvexes' anagrammed gives 'EXPANSIVE'.

Can you help me to learn more?

(Other definitions for expansive that I've seen before include "Tending to get bigger" , "Wide-ranging" , "Talkative" , "Covering a wide area" , "Genial" .)

I've seen this clue in The Telegraph.

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