"That's enough" (4)
(Other definitions for no more that I've seen before include "opposite of what Oliver wanted" , "Monroe (anag)" , "Never again, that's the end of it" , "Never again, all gone" , "Never again, that's the lot" .)
'that's enough' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for when that I've seen before include "stop pouring the drink" , "Say it when you''ve had enough" , "Over what period?" , "As soon as" , "At what time?" .)