Headquarters to suspend boycott, they say (7)
I believe the answer is:
station
'headquarters' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
(Other definitions for station that I've seen before include "Base, post" , "Place - railway stop - HQ - standing" , "Military base; rail stop" , "Railway halt" , "place to go to train" .)