Hero-worship (9)
'hero-worship' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lionise that I've seen before include "'Celebrate, treat as a hero (7)'" , "Make fuss of (celebrity)" , "Glorify; treat as a hero" , "Hero-worship" , "Treat as celebrity - like Leo?" .)
'hero-worship' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for adulation that I've seen before include "Excessive admiration" , "Adoration, idolisation" , "Servile flattery" , "Hero-worship" , "Praise - flattery" .)
(Other definitions for adoration that I've seen before include "high regard" , "Great affection" , "praise" , "Not a radio (anag.)" , "passionate allegiance" .)