At best, I see, something interesting (5)
I believe the answer is:
topic
'something interesting' is the definition.
I can't tell whether this definition defines the answer.
'at best i see' is the wordplay.
'at' means one lot of letters go next to another.
'best' becomes 'top' (top can mean the very best).
'see' becomes 'C' (the word for the letter, according to Chambers).
'top' put next to 'i' is 'topi'.
'topi'+'c'='TOPIC'
Can you help me to learn more?
(Other definitions for topic that I've seen before include "Subject matter, theme" , "'Theme, subject (5)'" , "Subject (of, eg, speech)" , "one discussed" , "Something to discuss" .)