Grasp real change at noon (5)
I believe the answer is:
learn
'grasp' is the definition.
(thesaurus)
'real change at noon' is the wordplay.
'change' is an anagram indicator.
'at' says to put letters next to each other.
'noon' becomes 'n'.
'real' is an anagram of 'lear'.
'lear'+'n'='LEARN'
(Other definitions for learn that I've seen before include "Succeed in school" , "Commit to memory" , "Study (at school?)" , "Gain knowledge or skills" , "Pick up" .)