With damaged sax outside Head Office, a South African clicks in this (5)
I believe the answer is:
xhosa
But I can't explain it at all! Could you help me understand?
(Other definitions for xhosa that I've seen before include "South African language spoken with clicks" , "South African cattle-rearing people" , "Member of a Bantu-speaking tribe" , "South African tribe" , "Clicking tongue" .)