Strange blue nuts are very noticeable (8)
I believe the answer is:
unsubtle
'very noticeable' is the definition.
I can't tell whether this definition defines the answer.
'strange blue nuts' is the wordplay.
'strange' indicates anagramming the letters.
'blue'+'nuts'='bluenuts'
'bluenuts' is an anagram of 'UNSUBTLE'.
'are' is the link.
Can you help me to learn more?
(Other definitions for unsubtle that I've seen before include "Obvious, clumsy" , "open" , "Blunt Sue may be lacking in tact" , "Forthright" , "without sophistication" .)