Regular boy at Grammar School providing services later (9)

I believe the answer is:

evensongs

'services later' is the definition.
(church services towards the end of the day)

'regular boy at grammar school' is the wordplay.
'regular' becomes 'even' (similar in meaning).
'boy' becomes 'son' (synonyms).
'at' is a charade indicator (letters next to each other).
'grammar school' becomes 'GS' (abbreviation for grammar school).
'even'+'son'+'gs'='EVENSONGS'

'providing' acts as a link.

(Another definition for evensongs that I've seen is " Church services".)

I've seen this clue in The Times.

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