One attempt to include load about worship (8)
I believe the answer is:
idolatry
'worship' is the definition.
(I know that idolatry is a type of idolatry)
'one attempt to include load about' is the wordplay.
'one' becomes 'i' (Roman numeral).
'attempt to' becomes 'try' (I've seen this in other clues).
'include' indicates putting letters inside.
'about' indicates an anagram.
'i'+'try'='itry'
'load' is an anagram of 'dola'.
'itry' going around 'dola' is 'IDOLATRY'.
(Other definitions for idolatry that I've seen before include "bowing down before a goddess?" , "The worship of graven images or false gods" , "Worship of a false god" , "Extreme admiration" , "Adulation" .)