They’re barely recognisable on certain beaches (7)
I believe the answer is:
nudists
'barely recognisable on certain beaches' is the definition.
I know that 'barely' relates to this answer. I also know that both the answer and definition are plural nouns
I don't understand how the remainder of the clue works.
(Other definitions for nudists that I've seen before include "Strippers?" , "they're not in gear" , "Things abandoned by those" , "exposed people" , "They're exposed" .)