Former F1 champion's peak? (4)
I believe the answer is:
hill
I believe this is a double definition.
'former f1 champion's' is the first definition.
(British Formula 1 driver Damon Hill)
'peak?' is the second definition.
(thesaurus)
(Other definitions for hill that I've seen before include "Mound (of mole, ants)" , "Incline" , "Miniature mountain" , "High point, but not a mountain" , "Mount" .)