Grayson Perry, say, displeased with sideboard? (5-7)
I believe the answer is:
cross-dresser
'grayson perry say' is the definition.
(cross-dressing artist Grayson Perry)
'displeased with sideboard?' is the wordplay.
'displeased' becomes 'cross'.
'with' is a charade indicator (letters next to each other).
'sideboard?' becomes 'dresser' (I've seen this before).
'cross'+'dresser'='CROSS-DRESSER'
(Other definitions for cross-dresser that I've seen before include "One wearing clothing typical of the opposite sex" , "Transvestite" , "Man in a woman's outfit (or vice-versa)" .)