Disorder created when force twice breaks law (6)
I believe the answer is:
ruffle
'disorder' is the definition.
(thesaurus)
'force twice breaks law' is the wordplay.
'force' becomes 'f' (symbol used in Physics e.g. f=ma).
'twice' says to double the letters.
'breaks' is an insertion indicator (inserted letters break into the word).
'law' becomes 'rule' (rule is a kind of law).
'f' duplicated is 'ff'.
'ff' placed into 'rule' is 'RUFFLE'.
'created when' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ruffle that I've seen before include "Disturb the calm or smoothness of - feathers?" , "Dishevel - annoy" , "Disrupt smooth surface" , "Disturb the evenness of feelings or feathers" , "Cause (feathers) to stand up" .)