On return, is not revising one's ideas (7)
I believe the answer is:
notions
'one's ideas' is the definition.
'notions' can be an answer for 'ideas' (notion is a kind of idea). I am not sure about the 'one's' bit.
'on return is not revising' is the wordplay.
'return' is a reversal indicator.
'revising' indicates anagramming the letters.
'on' back-to-front is 'no'.
'is'+'not'='isnot'
'isnot' with letters rearranged gives 'tions'.
'no'+'tions'='NOTIONS'
Can you help me to learn more?
(Other definitions for notions that I've seen before include "Fanciful or capricious ideas" , "Whims, ideas or small personal articles" , "Fanciful feelings" , "Vague ideas" , "Thoughts" .)