Clue: Deceiving band in double-cross that's been planned throughout (9,5)
Answer: STRINGING ALONG
Explanation: Definition: Deceiving
 RING(a circular band) **contained in**(in) STING(a double-cross/a deception that has been planned) + ALONG(moving in a constant direction/through/throughout?, as in "we walked along/through the passageway", whereas "we walked all along/throughout the given route".