Reasonably good show (4)
I believe the answer is:
fair
This clue might be a double definition.
'reasonably good' is the first definition.
'fair' can be an answer for 'good' (thesaurus). I'm not certain of the 'reasonably' bit.
'show' is the second definition.
(I know that fair is a type of show)
Can you help me to learn more?
(Other definitions for fair that I've seen before include "Satisfactory" , "All clues should be" , "Free from bias" , "Just; passable" , "Average" .)