Set of cardinals overlooking Latin characteristic of an arch? (7)
I believe the answer is:
concave
'characteristic of an arch?' is the definition.
(an arch is a concave curve)
'set of cardinals overlooking latin' is the wordplay.
'set of cardinals' becomes 'conclave' (meeting of Catholic cardinals).
'overlooking' indicates named letters should be taken away.
'latin' becomes 'l'.
'conclave' with 'l' taken out is 'CONCAVE'.
(Other definitions for concave that I've seen before include "Arch" , "Hollowed" , "Curving inward" , "Bending inwards" , "Curving inwards" .)