Before start of acclamation note the low points (6)
I believe the answer is:
minima
'the low points' is the definition.
(I've seen this before)
'before start of acclamation note' is the wordplay.
'before' is a charade indicator (letters next to each other).
'start of' indicates taking the first letters.
'note' becomes 'minim' (minim is a kind of note**).
The first letter of 'acclamation' is 'a'.
'a' after 'minim' is 'MINIMA'.
(Other definitions for minima that I've seen before include "Lowest points" , "Lowest values" , "unbeatable prices?" , "Lowest quantity or amount" , "Lowest possible amounts" .)