Go through again what the old car engine may need (6)
I believe the answer is:
rebore
'what the old car engine may need' is the definition.
I can't tell whether this defines the answer.
'go through again' is the wordplay.
'go' becomes 'ebor' (I can't explain this - if you can you should give a lot more credence to this answer).
'through' indicates putting letters inside (inserted letters go through the word).
'again' becomes 're' (prefix meaning 'again').
'ebor' placed within 're' is 'REBORE'.
Can you help me to learn more?
I've seen this clue in The Globe and Mail.
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