Indicators of hours and seconds? (5)
I believe the answer is:
hands
'indicators' is the definition.
(I know this)
'hours and seconds?' is the wordplay.
'hours' becomes 'h'.
'seconds?' becomes 's' (abbreviation).
'h'+'and'+'s'='HANDS'
'of' acts as a link.
(Other definitions for hands that I've seen before include "Those holding harness" , "Workmen" , "Cards given out in deal" , "Crew members" , "Workers" .)