Puts up with masses (5)
I believe the answer is:
lumps
This clue is a double definition.
'puts up with' is the first definition.
(lump can mean to bear or tolerate)
'masses' is the second definition.
(I have seen 'Compact masses ' mean 'lumps' so perhaps 'masses' could also mean 'lumps')
(Other definitions for lumps that I've seen before include "Clods or swellings" , "Compact masses" , "Puts up with" , "Chunks" .)