Theme park attraction - for some, a horrid experience! (4)
I believe the answer is:
ride
'theme park attraction' is the definition.
(I've seen this in another clue)
'some a horrid experience' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'RIDE' can be found hidden inside 'horrid experience'.
'for' acts as a link.
(Other definitions for ride that I've seen before include "Take a trip" , "Travel, by horse say" , "Go by bicycle" , "Go by horse" , "Eg, roundabout or roller-coaster, path for horses" .)