Fearing it's not for the novice (6)
I believe the answer is:
uneasy
'fearing it's' is the definition.
I can't judge whether this defines the answer.
'not for the novice' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'for' says to put letters next to each other.
'the novice' becomes 'easy' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'un'+'easy'='UNEASY'
Can you help me to learn more?
(Other definitions for uneasy that I've seen before include "Anxious, uncomfortable" , "Nervous, worried" , "Tense, edgy" , "Restless, perturbed" , "This is neither settled" .)