Abstinence having caught rash accepting sex (8)
I believe the answer is:
chastity
'abstinence' is the definition.
(I know that chastity is a type of abstinence)
'caught rash accepting sex' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'rash' becomes 'hasty' (I've seen this in another clue).
'accepting' indicates putting letters inside (inserted letters are accepted).
'sex' becomes 'it' (a common euphemism).
'hasty' going around 'it' is 'hastity'.
'c'+'hastity'='CHASTITY'
'having' is the link.
(Other definitions for chastity that I've seen before include "Abstinence and purity" , "Pure character" , "Abstention from carnal activity" , "Sexual purity" , "Sexual abstinence" .)