Rocky star totally covered with rock? (8)
I believe the answer is:
stallone
'rocky star' is the definition.
(I've seen this in another clue)
'totally covered with rock?' is the wordplay.
'totally' becomes 'all' (I've seen this in another clue).
'covered with' indicates putting letters inside.
'rock?' becomes 'stone' (synonyms).
'all' inserted inside 'stone' is 'STALLONE'.
(Other definitions for stallone that I've seen before include "Sylvester ........, Hollywood tough guy" , "Sylvester - (Rambo)" , "Sylvester -, US actor" , "Hollywood actor" , "See 6" .)