Christopher has it at the weekend (3)
I believe the answer is:
kit
'christopher' is the definition.
(short for Christopher)
'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' acts as a 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" .)