Frugal wife aggravated conflict in 1991 (4,3)

I believe the answer is:

gulf war

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'conflict in 1991' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'frugal wife aggravated' is the wordplay.
'wife' becomes 'w' (abbreviation).
'aggravated' indicates anagramming the letters.
'frugal'+'w'='frugalw'
'frugalw' with letters rearranged gives 'GULF WAR'.

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(Other definitions for gulf war that I've seen before include "Hostilities in 1991" , "First armed conflict between USA and Saddam Hussein" .)

I've seen this clue in The Sun.

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