In lookout try to capture a grazing animal: artist failing (6)
I believe the answer is:
gazebo
'in lookout' is the definition.
'gazebo' can be an answer for 'lookout' (thesaurus). I am not certain of the 'in' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for gazebo that I've seen before include "Small summerhouse or open hut" , "Kind of garden summerhouse with wide view" , "Garden sumer-house with wide view" , "Summerhouse with views" , "Summerhouse - pavilion with view" .)