Perhaps one clergyman with less sensitivity (8,6)
I believe the answer is:
cardinal number
'perhaps one' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe there's a link between them I don't understand?
'clergyman with less sensitivity' is the wordplay.
'clergyman' becomes 'cardinal' (cardinal is a kind of clergyman).
'with less sensitivity' becomes 'number' (I can't justify this - if you can you should give a lot more credence to this answer).
'cardinal'+'number'='CARDINAL NUMBER'
Can you help me to learn more?
(Other definitions for cardinal number that I've seen before include "E.g. one" , "For instance, one" , "It could be one" , "Maybe one" , "one, perhaps" .)