Change neat arrangement of every other one (9)
I believe the answer is:
alternate
'every other one' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I can't see?
'change neat arrangement' is the wordplay.
'change' becomes 'alter' (synonyms).
'arrangement' is an anagram indicator.
'neat' is an anagram of 'nate'.
'alter'+'nate'='ALTERNATE'
'of' is the link.
Can you help me to learn more?
(Other definitions for alternate that I've seen before include "Occurring in turn repeatedly" , "go back and forth" , "deputy" , "Change repeatedly between two" , "Take turns" .)