Mark on back of James Bond (5)
I believe the answer is:
stick
'bond' is the definition.
(I know that bond can be written as stick)
'mark on back of james' is the wordplay.
'mark' becomes 'tick' (I've seen this before).
'on' says to put letters next to each other.
'back of' suggests the final letters.
The final letter of 'james' is 's'.
'tick' put after 's' is 'STICK'.
(Other definitions for stick that I've seen before include "Rod" , "Tolerate" , "School punishment once" , "Adhere - cane" , "Join firm" .)