Religious lecturer securing taxi to drop book off (9)
I believe the answer is:
Here is my best explanation:
'off' is the definition.
Although both the answer and definition are adjectives, I can't see how one could define the other.
'religious lecturer securing taxi to drop book' is the subsidiary indication.
'religious lecturer' becomes 'don' (I've seen this before. I am not sure about the 'religious' bit.**).
'securing' is an insertion indicator.
'taxi' becomes 'minicab' (I've seen this before).
'to drop' is a deletion indicator.
'book' becomes 'b'.
'minicab' with 'b' taken out is 'minica'.
'don' going around 'minica' is 'dominican'.
(Other definitions for dominican that I've seen before include "Black Friar", "One working in order", "- - Republic, West Indies", "Religious", "Caribbean islander", "Sister", "From the Caribbean", "Republican", "sister of Caribbean descent" and "Black friar".)