Holidaymaker affected to a greater extent? (6)
I believe the answer is:
camper
I believe this clue is a double definition.
'holidaymaker' is the first definition.
(I've seen this before)
'affected to a greater extent?' is the second definition.
(camp can mean affected)
(Other definitions for camper that I've seen before include "Touring vehicle" , "more affected?" , "Tent resident" , "One using tent" , "Holidaymaker with tent" .)