Stiffness (5)
'stiffness' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rigidity that I've seen before include "Inability to bend" , "Unbending nature" , "Inflexibility, stiffness" , "Strictness" .)
'stiffness' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rigor that I've seen before include "Stiff, irresponsive state" , "Muscular cramp" , "- - mortis" , "Chilled shivering often a symptom of disease" , "Stiffness (after death?)" .)