Assigning rank to renegade is much more silly (7)
I believe the answer is:
rattier
'more silly' is the definition.
Both the definition and answer are comparative adjectives. Maybe they are linked in a way I don't understand?
'assigning rank to renegade is much' is the wordplay.
I cannot quite see how this works, but
'rank' could be 'tier' (tier is a kind of rank) and 'tier' is found within the answer.
'renegade' could be 'rat' (I've seen this before) and 'rat' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rattier that I've seen before include "more irritable mood" , "More bad tempered (colloquial)" , "more likely to snap?" , "more annoyed" , "Not so placid" .)