Rows about a hundred changes (12)
I believe the answer is:
altercations
'rows' is the definition.
(I know this)
'about a hundred changes' is the wordplay.
I cannot quite see how this works, but
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is located in the answer.
'a' is found in the answer.
'hundred' could be 'a' (synonyms) and 'a' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for altercations that I've seen is " Noisy arguments".)