nicely wound clock not just ticking , but humming 
(ROOT (S (ADVP (RB nicely)) (NP (NN wound) (NN clock)) (VP (CONJP (RB not) (RB just)) (VP (VBG ticking)) (, ,) (CC but) (VP (VBG humming)))))
(ROOT (S (ADVP (RB )) (NP (NN ) (NN )) (VP (CONJP (RB ) (RB )) (VP (VBG )) (, ) (CC ) (VP (VBG )))))