Joy describing one male in for murder (11)
I believe the answer is:
elimination
'for murder' is the definition.
(elimination is a kind of murder)
'joy describing one male in' is the wordplay.
'joy' becomes 'elation' (elation is a kind of joy).
'describing' means one lot of letters goes inside another (describe can mean to form the outline of).
'one' becomes 'i' (Roman numeral).
'male' becomes 'm' (common abbreviation).
'i'+'m'+'in'='imin'
'elation' going around 'imin' is 'ELIMINATION'.
(Other definitions for elimination that I've seen before include "Consequence of defeat" , "failure to qualify" , "Erasure" , "Deletion" , "heat results?" .)