Are about to act in worship (5)
I believe the answer is:
adore
'worship' is the definition.
(I've seen this before)
'are about to act' is the wordplay.
I cannot really understand how this works, but
'are' could be 'a' (short for 'are', historical unit of measurement) and 'a' is located in the answer.
'about' could be 're' ('re' means regarding or about) and 're' is located in the answer.
'act' could be 'do' (to do is to act or execute a task) and 'do' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for adore that I've seen before include "Love, worship" , "Love (someone) deeply" , "Honour" , "Very much like" , "Cherish" .)