Head claims underworld affected site where holidaymakers uncovered lodge (6,4)
I believe the answer is:
nudist camp
'site where holidaymakers uncovered lodge' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'head claims underworld affected' is the wordplay.
'head' becomes 'nut' (informal term for somebody's head).
'claims' indicates putting letters inside.
'underworld' becomes 'dis' (underworld in classical mythology).
'affected' becomes 'camp' (camp can mean exaggerated or affected).
'nut' placed around 'dis' is 'nudist'.
'nudist'+'camp'='NUDIST CAMP'
Can you help me to learn more?
(Another definition for nudist camp that I've seen is " Naturist site".)