I don't know how to discover what I'm carrying (6,2)
I believe the answer is:
search me
'i don't know' is the definition.
('search me' can informally mean 'I don't know')
'to discover what i'm carrying' is the wordplay.
I cannot really see how this works, but
'i'm' could be 'me' (both refer to the person speaking or writing) and 'me' is present in the answer.
The remaining letters 'search' 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).
'how' acts as a link.
Can you help me to learn more?
(Other definitions for search me that I've seen before include "I certainly don't know" , "Church reciting book" , "I've no idea" , "what suspicious police might do" , "check my pockets" .)