"Noisier" is the word I changed back again (7)
I believe the answer is:
rowdier
'noisier' is the definition.
Both the answer and definition are comparative adjectives. Maybe there's a link between them I don't understand?
'the word i changed back again' is the wordplay.
'changed' indicates an anagram.
'back' is a reversal indicator.
'again' becomes 're' (prefix meaning 'again').
're' backwards is 'er'.
'word'+'i'='wordi'
'wordi' anagrammed gives 'rowdi'.
'rowdi'+'er'='ROWDIER'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for rowdier that I've seen before include ""noisier"" , "more noisy" , "More raucous" , "more disturbing" .)