Get mother to request material (6)
I believe the answer is:
damask
'material' is the definition.
(I know that damask is a type of material)
'get mother to request' is the wordplay.
'get' says to put letters next to each other.
'mother' becomes 'dam' (female parent of an animal).
'to request' becomes 'ask' (to ask is to request something).
'dam' put next to 'ask' is 'DAMASK'.
(Other definitions for damask that I've seen before include "Figured material" , "Table linen material" , "Fine linen with woven pattern" , "Patterned material" , "Heavy patterned fabric" .)