Nude is strangely finding knickers, say (6)
I believe the answer is:
undies
'knickers say' is the definition.
(underwear)
'nude is strangely' is the wordplay.
'strangely' indicates anagramming the letters.
'nude'+'is'='nudeis'
'nudeis' with letters rearranged gives 'UNDIES'.
'finding' is the link.
(Other definitions for undies that I've seen before include "Lingerie -- is nude (anag)" , "Used in (anag) -- unmentionables" , "Personal attire" , "Undergarments (colloq.)" , "linen" .)