Little Christopher’s equipment (3)
I believe the answer is:
kit
'equipment' is the definition.
(kit is a kind of equipment)
'little christopher's' is the wordplay.
'little' means to remove the last letter (the word is not quite complete).
'christopher's' becomes 'Kit's' (short for Christopher).
'kits' with its last letter taken away is 'KIT'.
(Other definitions for kit that I've seen before include "Young beaver" , "Football top, shorts, stockings and boots?" , "In strip" , "Young stoat" , "Marlowe" .)