Noon, and climb just beginning (7)
I believe the answer is:
nascent
'just beginning' is the definition.
(I've seen this before)
'noon and climb' is the wordplay.
'noon' becomes 'n'.
'and' is a charade indicator (letters next to each other).
'climb' becomes 'ascent' (synonyms).
'n'+'ascent'='NASCENT'
(Other definitions for nascent that I've seen before include "Coming into being, beginning to develop" , "Budding early" , "starting to happen" , "coming into circulation?" , "Being born - scan net (anag)" .)