Check question material (6)
I believe the answer is:
damask
'material' is the definition.
(I know that damask is a type of material)
'check question' is the wordplay.
'check' becomes 'dam' (I've seen this in another clue).
'question' becomes 'ask' (asking a question).
'dam'+'ask'='DAMASK'
(Other definitions for damask that I've seen before include "Table linen material" , "Red" , "Figured material" , "Fine linen with woven pattern" , "heavy embossed table linen" .)