Extreme admiration (3)
'extreme admiration' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for idolatry that I've seen before include "Icon worship" , "Hero worship" , "Worship of a false god" , "Excessive devotion" , "Adroitly (anag.)" .)
(Other definitions for awe that I've seen before include "Scots lock [LOCH??]" , "Reverential wonder" , "alarm" , "Overwhelming feeling" , "Great wonder" .)