Balance up repeatedly (5)
I believe the answer is:
level
'balance' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for level that I've seen before include "Palindromically smooth" , "Straight, even" , "Storey - stage" , "Horizontal plane - a palindrome" , "Neck and neck" .)