Maybe the rider is an indecisive hesitant person (8)
I believe the answer is:
ditherer
'hesitant person' is the definition.
(I've seen this before)
'maybe the rider' is the wordplay.
'maybe' is an anagram indicator.
'the'+'rider'='therider'
'therider' is an anagram of 'DITHERER'.
'is an indecisive' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for ditherer that I've seen before include "Indecisive person" , "Hesitant person" , "person who hesitates" .)