Gallery gives girl tumultuous hand (8)
I believe the answer is:
verandah
'gallery' is the definition.
('verandah' can be a synonym of 'gallery')
'girl tumultuous hand' is the wordplay.
'girl' becomes 'vera' (**).
'tumultuous' indicates an anagram.
'hand' is an anagram of 'ndah'.
'vera'+'ndah'='VERANDAH'
'gives' acts as a link.
(Other definitions for verandah that I've seen before include "Porch" , "gallery" , "Portico" , "Roofed area on the side of a house" , "Roofed platform adjoining a house" .)