Simple point, say, to change (4)
I believe the answer is:
easy
'simple' is the definition.
(similar in meaning)
'point say to change' is the wordplay.
'point' becomes 'e' (compass point).
'to change' indicates an anagram.
'say' with letters rearranged gives 'asy'.
'e'+'asy'='EASY'
(Other definitions for easy that I've seen before include "Requiring little effort" , "Facile" , "Undemanding" , "Obliging; go carefully" , "Effortless, uncomplicated" .)