Son's holiday with an exotic dancer? (8)
I believe the answer is:
stripper
'exotic dancer?' is the definition.
(I know that exotic dancer can be written as stripper)
'son's holiday with an' is the wordplay.
'holiday' becomes 'trip' (I've seen this before).
'with' means one lot of letters go next to another.
'an' becomes 'per' (synonymous as in 'once an hour', 'once per hour').
's'+'trip'+'per'='STRIPPER'
(Other definitions for stripper that I've seen before include "She barely finishes" , "Exotic dancer" , "Teasing dancer" , "One barely entertains" , "she reveals" .)