150 snakes offering embraces (6)
I believe the answer is:
clasps
'embraces' is the definition.
(I've seen this before)
'150 snakes' is the wordplay.
'150' becomes 'CL' (roman numerals).
'snakes' becomes 'asps' (asp is a kind of snake).
'cl'+'asps'='CLASPS'
'offering' acts as a link.
(Other definitions for clasps that I've seen before include "Holds or embraces closely" , "Embraces, hugs" , "Embraces; fastenings" , "Holds the fastenings to one's bosom" , "Fasteners, as on necklaces perhaps" .)