Crossword Genius

Old horse of Golden Age (3)

Ross

I believe the answer is:

nag

'old horse' is the definition.
(I've seen this before)

'of golden age' is the wordplay.
'of' indicates a hidden word.
'NAG' is hidden in the letters of 'golden age'.

(Other definitions for nag that I've seen before include "Complain, worry" , "Poor horse" , "Henpeck like old horse" , "Constantly scold - small horse" , "Old horse or shrewish wife" .)

I've seen this clue in The Sun.
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