Yours truly repulsed by sex thing (4)
I believe the answer is:
item
'thing' is the definition.
(I've seen this before)
'yours truly repulsed by sex' is the wordplay.
'yours truly' becomes 'me'.
'repulsed' is a reversal indicator.
'by' means one lot of letters go next to another.
'sex' becomes 'it' (a common euphemism).
'me' in reverse letter order is 'em'.
'em' after 'it' is 'ITEM'.
(Other definitions for item that I've seen before include "Unit; detail" , "date" , "point" , "See couple" , "newspaper article" .)