Loved getting hold of chapter 50, editor revealed (8)
I believe the answer is:
declared
'revealed' is the definition.
('declare' can be a synonym of 'reveal')
'loved getting hold of chapter 50 editor' is the wordplay.
'loved' becomes 'dear' (similar in meaning).
'getting hold of' means one lot of letters goes inside another.
'chapter' becomes 'c' (abbreviation).
'50' becomes 'l' (Roman numeral).
'editor' becomes 'ed' (abbreviation).
'c'+'l'='cl'
'dear' placed around 'cl' is 'declar'.
'declar'+'ed'='DECLARED'
(Other definitions for declared that I've seen before include "Announced, proclaimed" , "Announced publicly" , "Named the trump suit in card game" , "Closed an innings" , "Made clearly known" .)