Encouraging discovery, this cure I developed (9)
I believe the answer is:
heuristic
'encouraging discovery' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'this cure i developed' is the wordplay.
'developed' is an anagram indicator.
'this'+'cure'+'i'='thiscurei'
'thiscurei' with letters rearranged gives 'HEURISTIC'.
Can you help me to learn more?
(Other definitions for heuristic that I've seen before include "classroom style?" , "Helping one to discover for oneself" .)