All others fall: hold back!
I believe the answer is:
re-strain
'hold back' is the definition.
(I've seen this before)
'all others fall' is the wordplay.
'all others' becomes 'rest' (as in the rest of a group).
'fall' becomes 'rain' (raining is a kind of falling).
'rest'+'rain'='RE-STRAIN'
(Other definitions for re-strain that I've seen before include "Tether" , "Prevent from doing something" , "Hold back, suppress" , "Arrest - confine - subdue" , "Keep under control in terrains" .)