Deceiving band in double-cross that's been planned throughout (9,5)

'deceiving' is the definition.
Although both the answer and definition are present participle verbs, I don't see how one could define the other.

'band in double-cross that's been planned throughout' is the wordplay.
I cannot really see how this works, but
'band' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'in' is present in the answer.
'cross' could be 't' (shape) and 't' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?