Expertise in a ward? (4)
I believe the answer is:
gift
'expertise in a ward?' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for gift that I've seen before include "Natural talent" , "Offering" , "Special aptitude - present" , "flair" , "Give away" .)