Turns away from bad serve (5)
I believe the answer is:
veers
'turns away' is the definition.
'veers' can be an answer for 'turns' (veering is a kind of turning). I'm unsure of the 'away' bit.
'bad serve' is the wordplay.
'bad' is an anagram indicator.
'serve' anagrammed gives 'VEERS'.
'from' is the link.
Can you help me to learn more?
(Other definitions for veers that I've seen before include "Swerves" , "Turns sharply" , "Changes direction abruptly" .)