Quiet grudge I held in fearful anticipation (12)
I believe the answer is:
presentiment
'fearful anticipation' is the definition.
(presentiment is a bad feeling about the future)
'quiet grudge i held' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'grudge' becomes 'resentment' (I've seen this before).
'held' indicates putting letters inside.
'resentment' enclosing 'i' is 'resentiment'.
'p'+'resentiment'='PRESENTIMENT'
'in' is the link.
(Other definitions for presentiment that I've seen before include "Intuitive foreboding" , "bad feeling" , "An intuitive feeling" , "Feeling of apprehension" .)