Artist penning book with ends of crayons (6)
I believe the answer is:
stubbs
'artist' is the definition.
(I've seen this before)
'penning book with ends of crayons' is the wordplay.
'penning' becomes 'stub' (I can't explain this - if you can you should believe this answer much more).
'book' becomes 'b'.
'with' says to put letters next to each other.
'ends of' says to take the final letters (I've seen 'ending of' mean this).
The last letter of 'crayons' is 's'.
'stub'+'b'+'s'='STUBBS'
Can you help me to learn more?
(Other definitions for stubbs that I've seen before include "George --, painter known for horse portraits" , "Horse painter, d. 1806" , "Artistic horseman" , "English artist" , "English painter" .)