Way mod conceals the shivering (6)
I believe the answer is:
method
'way' is the definition.
(I know that way can be written as method)
'mod conceals the shivering' is the wordplay.
'conceals' means one lot of letters goes inside another.
'shivering' indicates anagramming the letters.
'the' anagrammed gives 'eth'.
'mod' placed around 'eth' is 'METHOD'.
(Other definitions for method that I've seen before include "Way of doing something, even in madness (6)" , "Systematic way of doing something" , "Orderliness (of thought or behaviour)" , "Type of acting" , "Procedure for achieving an end" .)