Inspector, formerly a pit worker (8)

I believe the answer is:

examiner

'inspector' is the definition.
(I know that inspector can be written as examiner)

'formerly a pit worker' is the wordplay.
'formerly' becomes 'ex' (prefix meaning former or onetime).
'pit worker' becomes 'miner' (miners work down pits).
'ex'+'a'+'miner'='EXAMINER'

(Other definitions for examiner that I've seen before include "He gives you paper" , "Assessor" , "Who judges" , "Meaner XI (anag)" , "One looks for information" .)

I've seen this clue in The Times.

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