Only looks carefully round, but it makes one feel better (8)
I believe the answer is:
consoles
'but it makes one feel better' is the definition.
I can't tell whether this defines the answer.
'only looks carefully round' is the wordplay.
'only' becomes 'sole' (synonyms).
'looks carefully' becomes 'cons' (I can't justify this - if you can you should believe this answer much more).
'round' is an insertion indicator.
'sole' going inside 'cons' is 'CONSOLES'.
Can you help me to learn more?
(Other definitions for consoles that I've seen before include "Comforts about coolness" , "Gives solace" .)