Chills a visitor misplacing suitcase (4)
I believe the answer is:
ague
'chills' is the definition.
(I've seen this in another clue)
'a visitor misplacing suitcase' is the wordplay.
I cannot quite understand how this works, but
'a' is present in the answer.
The remaining letters 'gue' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ague that I've seen before include "Acute fever; shivering fit" , "Malarial fever or fit of shivering" , "Fever with shivers" , "Old word for fever" , "Fever (archaic)" .)