Racing driver, rock singer and holy man drink sparkling water (7)
I believe the answer is:
stewart
'racing driver rock singer' is the definition.
(racing driver Jackie Stewart, singer Rod Stewart)
'holy man drink sparkling water' is the wordplay.
'holy man' becomes 'st' (abbreviation for saint).
'drink' indicates putting letters inside.
'sparkling' is an anagram indicator (I've seen this in other clues).
'water' with letters rearranged gives 'tewar'.
'st' going around 'tewar' is 'STEWART'.
'and' is the link.
(Other definitions for stewart that I've seen before include "Royal family" , "Jackie, Rod or Patrick" , "Man" , "chap..." , "Racing driver" .)