Season preceded by 1960s' musical — watch part (10)
I believe the answer is:
hairspring
'watch part' is the definition.
(I've seen this in another clue)
'season preceded by 1960s' musical' is the wordplay.
I cannot really see how this works, but
'season' could be 'spring' (spring is a season) and 'spring' is present in the answer.
'musical' could be 'hair' (1960s musical) and 'hair' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for hairspring that I've seen before include "Part of watch" , "Watch component" .)