Leaderless gang putting a robe with cut sides on top of a geometrical feature (7)
I believe the answer is:
oblique
'feature' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oblique that I've seen before include "Slanting, indirect" , "slash" , "Angled" , "Slanting, or expressed indirectly" , "Indirect - devious" .)