Planning that makes sense (7)
I believe the answer is:
meaning
'sense' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for meaning that I've seen before include "Import; purpose" , "Purpose, intent" , "Definition (of 7 21?)" , "Sense intended" , "Gist" .)