Luxuriant condition of hair is prominent in coach (9)

I believe the answer is:

bushiness

'luxuriant condition of hair' is the definition.
(as in bushy hair)

'is prominent in coach' is the wordplay.
'is prominent' becomes 'shines' (to shine is to be prominent or stand out).
'in' means one lot of letters goes inside another.
'coach' becomes 'bus' (synonyms).
'shines' placed within 'bus' is 'BUSHINESS'.

(Another definition for bushiness that I've seen is " Expansive growth".)

I've seen this clue in The Times.

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