Crusoe's man has twenty-four hours (6)
I believe the answer is:
friday
I believe this is a double definition.
'crusoe's man' is the first definition.
(I've seen this before)
'twenty-four hours' is the second definition.
(I've seen this before)
'has' is the link.
(Other definitions for friday that I've seen before include "Crusoe's Man (Defoe)" , "The 13th is considered unlucky" , "An islander" , "Where the weekend starts?" , ""Good" day at Easter?" .)