Gets excited with single accepting male's jewel (8)
I believe the answer is:
gemstone
'jewel' is the definition.
(I've seen this before)
'gets excited with single accepting male's' is the wordplay.
'excited' indicates anagramming the letters.
'with' is a charade indicator (letters next to each other).
'single' becomes 'one' (I've seen this before**).
'accepting' means one lot of letters goes inside another.
'male' becomes 'm' (common abbreviation).
'gets' anagrammed gives '[gets]'.
'[gets]'+'one'='gestone'
'gestone' placed around 'm' is 'GEMSTONE'.
(Other definitions for gemstone that I've seen before include "Emerald or ruby" , "Sparkler" , "Piece of crystalline rock as jewellery" , "[RUBY] , for example" , "Something precious" .)