Denise —, 2000 Olympic heptathlon gold medallist (5)
I believe the answer is:
lewis
(Other definitions for lewis that I've seen before include "Busy" , "Part of Hebridean island - boxer" , "our 1/4 Across [GOLD MEDALLIST] in 2000" , "Inspector Morse's assistant" , "Other half of Harris (Hebrides)" .)