Give no indication (5,4,4)
'give' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'no indication' is the wordplay.
I cannot quite understand how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is found within the answer.
'indication' could be 'key' (I've seen this in another clue) and 'key' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for shake ones head that I've seen before include "Make a gesture of negation" , "Signify dissent" , "Signify disagreement" , "Show disapproval" .)
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?