Atoll shows minimal swimsuit (6)
I believe the answer is:
bikini
This clue might be a double definition.
'atoll' is the first definition.
(I've seen this before)
'minimal swimsuit' is the second definition.
'bikini' can be an answer for 'swimsuit' (bikini is a kind of swimsuit). I'm not certain of the 'minimal' bit.
'shows' is the link.
Can you help me to learn more?
(Other definitions for bikini that I've seen before include "Site of A-Bomb tests; resultantly shocking swimwear!" , "Pacific island - swimming costume" , "Two piece swimsuit" , "Atoll and skimpy swimsuit" , "Women's tiny bathing costume" .)