Outburst (3)
'outburst' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for eruption that I've seen before include "Volcanic explosion" , "Volcanic outburst" , "Breaking out (of spots, lava etc)" , "Spot or rash appearing suddenly on the skin" , "Volcanic outpouring" .)
'outburst' is the definition.
(I know that cry is a type of outburst)
This is all the clue.
(Other definitions for cry that I've seen before include "Shed tears" , "Don't . . . over spilt milk" , "Sob or shout" , "Blubber" , "Sound of pain or grief" .)