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Son educates parent finally about minute part of engine (5-5)

Ross

I believe the answer is:

steam-chest

'part of engine' is the definition.
(part of a steam engine)

'son educates parent finally about minute' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'educates' becomes 'teaches'.
'finally' says to take the final letters.
'about' is an insertion indicator.
'minute' becomes 'm' (abbreviation).
The final letter of 'parent' is 't'.
'teaches'+'t'='teachest'
'teachest' going around 'm' is 'teamchest'.
's'+'teamchest'='STEAM-CHEST'

I've seen this clue in The Times.
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