Word that qualifies dog rolling over in awful mire (8)
I believe the answer is:
modifier
'word that qualifies' is the definition.
'modifier' can be an answer for 'word' (modifier is a kind of word). I'm not certain of the remainder of the definition.
'dog rolling over in awful mire' is the wordplay.
'dog' becomes 'fido' (I've seen this before).
'rolling over' is a reversal indicator.
'in' indicates putting letters inside.
'awful' indicates an anagram.
'fido' backwards is 'odif'.
'mire' with letters rearranged gives 'mier'.
'odif' placed into 'mier' is 'MODIFIER'.
Can you help me to learn more?
(Other definitions for modifier that I've seen before include "Adverb or adjective" , "qualifier" .)