Become rigid (6)
'become rigid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stiffen that I've seen before include "Become more rigid" , "Make hard" , "Add starch" , "Make rigid or inflexible" , "more severe" .)
'become rigid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for harden that I've seen before include "Set; become tougher" , "Temper, steel say" , "Become less sympathetic" , "Steel oneself" , "Become firm and solid" .)
'become rigid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ossify that I've seen before include "Get hard" , "Change into bone, become rigid" , "Make rigid" , "become inflexible" , "Become hard and bony with age" .)