Friends from the east? Precisely (4)
I believe the answer is:
slap
'precisely' is the definition.
(thesaurus)
'friends from the east?' is the wordplay.
'friends' becomes 'pals' (pal is a kind of friend).
'from the east?' shows that the letters should be reversed in order (I've seen 'from the east' mean this (on a map from right to left)).
'pals' backwards is 'SLAP'.
(Other definitions for slap that I've seen before include "A blow among pals" , "Strike action" , "Blow, maybe in the face" , "Hit with the palm" , "Hit with an open hand" .)