Father regularly missteps on platforms (6)
I believe the answer is:
daises
'platforms' is the definition.
(I know this)
'father regularly missteps on' is the wordplay.
'father' becomes 'da' (da can mean dad).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'on' is a charade indicator (letters next to each other).
The alternating letters of 'missteps' are 'ises'.
'da'+'ises'='DAISES'
(Other definitions for daises that I've seen before include "'Rostrums, platforms (6)'" , "'Podiums, platforms (6)'" , "Raised platforms in a hall" .)