Intercept an order to execute? (4,3)
I believe the answer is:
head off
'intercept' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for head off that I've seen before include "Intercept - at the pass?" , "Escape" , "Avoid" , "Block" , "demand of Queen of Hearts" .)