Crossword Genius

Failing in duty of reconstruction of one tunnel - QED! (10)

Ross

I believe the answer is:

delinquent

I'm a little stuck... Click here to teach me more about this clue!

'failing in duty of reconstruction' is the definition.
'delinquent' can be an answer for 'failing' (thesaurus). I'm not sure about the 'in duty of reconstruction' bit.

'of one tunnel qed' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'one' becomes 'i' (Roman numeral).
'i'+'tunnel'+'qed'='itunnelqed'
'itunnelqed' anagrammed gives 'DELINQUENT'.

Can you help me to learn more?

(Other definitions for delinquent that I've seen before include "Young offender" , "guilty of a minor offence" , "Neglectful of duty" , "SECOND PART OF 22" , "Offender, maybe juvenile" .)

I've seen this clue in the Sydney Morning Herald.
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