A turn performed by a novice is valid (7)
I believe the answer is:
natural
'valid' is the definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?
'a turn performed by a novice' is the wordplay.
'performed' is an anagram indicator.
'by' says to put letters next to each other.
'novice' becomes 'l' (as in a learner driver with L-plates on their car).
'a'+'turn'='aturn'
'aturn' is an anagram of 'natur'.
'natur'+'a'+'l'='NATURAL'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for natural that I've seen before include "Illegitimate" , "spontaneous" , "Genuine, unaffected" , "Unspoilt" , "Not man-made; off-white" .)