Snooker game stardom involving Ronnie initially (5)
I believe the answer is:
frame
'snooker game' is the definition.
(term for a game of snooker)
'stardom involving ronnie initially' is the wordplay.
'stardom' becomes 'fame' (I've seen this before).
'involving' indicates putting letters inside.
'initially' indicates taking the first letters.
The first letter of 'ronnie' is 'r'.
'fame' placed around 'r' is 'FRAME'.
(Other definitions for frame that I've seen before include "Potter's half-hour or so" , "Put together" , "Chassis, skeleton" , "Underlying structure" , "Supporting, enclosing, structure" .)