Poetic shepherd wandering lonely, avoiding lakes, mind (8)
I believe the answer is:
endymion
'poetic shepherd' is the definition.
The definition suggests a singular noun which matches the answer.
'wandering lonely avoiding lakes mind' is the wordplay.
'wandering' is an anagram indicator.
'avoiding' indicates named letters should be taken away.
'lakes' becomes 'LL' (a geographical abbreviation for lake written twice).
'lonely' with 'll' removed is 'oney'.
'oney'+'mind'='oneymind'
'oneymind' anagrammed gives 'ENDYMION'.
Can you help me to learn more?
(Other definitions for endymion that I've seen before include "Work by Keats" , "story of Keats" , "Moon lover; Keats poem" , "Handsome youth" , "Poem by Keats; beautiful youth" .)