Plenty of time to muse (5)

I believe the answer is:

erato

'muse' is the definition.
(Erato is an example)

'plenty of time to' is the wordplay.
'plenty of time' becomes 'era' (an era is a period of time).
'era'+'to'='ERATO'

(Other definitions for erato that I've seen before include "poetical inspiration" , "Clio's sister" , "Arts patron" , "Greek muse of lyric and love poetry" , "verses she inspired" .)

I've seen this clue in The Guardian.

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