Obscure weapon also included, involving intrigue (5,3,6)
I believe the answer is:
cloak and dagger
'involving intrigue' is the definition.
(I've seen this before)
'obscure weapon also included' is the wordplay.
I cannot quite see how this works, but
'weapon' could be 'dagger' (dagger is a kind of weapon) and 'dagger' is found in the answer.
'also' could be 'and' (both can mean in addition) and 'and' is located in the answer.
The remaining letters 'cloak' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cloak and dagger that I've seen before include "Involving a mystery" , "Clandestine" , "spying" , "Intriguing" , "whose point is concealed?" .)