Intimacy of miss chasing chapter head (9)
I believe the answer is:
closeness
'intimacy' is the definition.
(synonyms)
'of miss chasing chapter head' is the wordplay.
'of miss' becomes 'lose' (I can't explain this - if you can you should give a lot more credence to this answer).
'chasing' is a charade indicator (letters next to each other) (some letters chase after others).
'chapter' becomes 'c' (abbreviation).
'head' becomes 'ness' (ness is a headland).
'lose' put after 'c' is 'close'.
'close'+'ness'='CLOSENESS'
Can you help me to learn more?
(Other definitions for closeness that I've seen before include "sense of unity" , "State of being very near" , "Proximity" .)