Christopher has it at the weekend (3)
I believe the answer is:
kit
'christopher' is the definition.
(I've seen this in other clues)
'it at the weekend' is the wordplay.
'at' says to put letters next to each other (I've seen this in other clues).
'the weekend' becomes 'k' (I've seen this in other clues**).
'it' after 'k' is 'KIT'.
'has' is the link.
(Other definitions for kit that I've seen before include "Young stoat" , "Old song 'Pack up your troubles in your old . . . bag'" , "Specialised clothing or set of parts for assembly" , "tackle" , "Necessary equipment" .)