Buff relative given piercing (7)
I believe the answer is:
nankeen
'buff' is the definition.
(nankeen can mean a buff or beige colour)
'relative given piercing' is the wordplay.
'relative' becomes 'nan' (informal term for a grandmother).
'given' says to put letters next to each other.
'piercing' becomes 'keen' (synonyms).
'nan'+'keen'='NANKEEN'
(Other definitions for nankeen that I've seen before include "Yellowish stuff" , "Durable yellow cotton fabric, originally from China" , "Buff colour" , "Buff-coloured cotton fabric" , "Hard-wearing fabric, originally from China" .)