Novel, see, is at least testing! (7)
I believe the answer is:
easiest
'novel see is at least testing' is the definition.
I can't judge whether this definition defines the answer.
'novel see is at' is the wordplay.
'novel' indicates anagramming the letters.
'see'+'is'+'at'='seeisat'
'seeisat' anagrammed gives 'EASIEST'.
Can you help me to learn more?
(Other definitions for easiest that I've seen before include "Most convenient" , "most relaxed" , "Simplest" , "Least difficult" , "Most comfortable" .)