Old poems about Queen’s supervisors (9)

I believe the answer is:

overseers

'supervisors' is the definition.
(overseer is a kind of supervisor)

'old poems about queen's' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'poems' becomes 'verses' (verse is a kind of poem**).
'about' means one lot of letters goes inside another.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'verses' enclosing 'er' is 'verseers'.
'o'+'verseers'='OVERSEERS'

I've seen this clue in The Times.

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