It's not pleasant to see a damaged rose (7)
I believe the answer is:
eyesore
'it's not pleasant' is the definition.
I can't tell whether this definition defines the answer.
'see a damaged rose' is the wordplay.
'see' becomes 'eye' (I've seen this in another clue).
'a damaged' indicates anagramming the letters.
'rose' is an anagram of 'sore'.
'eye'+'sore'='EYESORE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for eyesore that I've seen before include "something one wouldn't want to see" , "An unsightly thing" , "offensive to viewers" , "Ugly sight, not nice to see" , "Ugly and offensive sight" .)