Iridescent swimming outfit, if revealing, thus described? (10)
I believe the answer is:
indiscreet
'outfit if revealing thus described?' is the definition.
I can't tell whether this defines the answer.
'iridescent swimming' is the wordplay.
'swimming' indicates an anagram (letters swim around into a new order).
'iridescent' is an anagram of 'INDISCREET'.
Can you help me to learn more?
(Other definitions for indiscreet that I've seen before include "Tactless" , "shameless" , "Reckless" , "Imprudent -- 10 across (anag)" , "Ill-judged" .)