Kit in strange arrangement (4)
I believe the answer is:
gear
'kit' is the definition.
(I've seen this before)
'in strange arrangement' is the wordplay.
'in' indicates the answer is hidden within the clue.
'GEAR' can be found hidden inside 'strange arrangement'.
(Other definitions for gear that I've seen before include "Equipment, clothing, goods" , "Toothed wheel and youthful fashion" , "Cogwheel - equipment" , "often changed when driving" , "Toothed wheel which engages with another one" .)