Unearth papers about complaint (3,3)

I believe the answer is:

dig out

'unearth' is the definition.
(thesaurus)

'papers about complaint' is the wordplay.
'papers' becomes 'id' (identification papers).
'about' is a reversal indicator.
'complaint' becomes 'gout' (gout is a kind of disease**).
'id' back-to-front is 'di'.
'di'+'gout'='DIG OUT'

(Another definition for dig out that I've seen is " Unearth".)

I've seen this clue in The Independent.

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