Resorts of times past (4)
I believe the answer is:
spas
'resorts' is the definition.
(spa is a kind of resort)
'of times past' is the wordplay.
'of' indicates the answer is hidden within the clue.
'SPAS' is hidden in the letters of 'times past'.
(Other definitions for spas that I've seen before include "Mineral springs" , "Health resorts near springs" , "Bath and suchlike" .)