Moves carefully inside overseas establishment (5)
I believe the answer is:
eases
'moves carefully' is the definition.
('ease' can be a synonym of 'move carefully')
'inside overseas establishment' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'EASES' can be found hidden inside 'overseas establishment'.
(Other definitions for eases that I've seen before include "Relieves, loosens" , "Relieves, lightens" , "Moderates" , "Facilitates" , "Softens" .)