Embarrassed graduated erected a garden building (7)
I believe the answer is:
abashed
'embarrassed' is the definition.
('abash' can be a synonym of 'embarrass')
'graduated erected a garden building' is the wordplay.
'graduated' becomes 'ba' (I can't justify this - if you can you should believe this answer much more).
'erected' says the letters should be written backwards (in a down clue, letters go up).
'garden building' becomes 'shed' (I've seen this in another clue).
'ba' backwards is 'ab'.
'ab'+'a'+'shed'='ABASHED'
Can you help me to learn more?
(Other definitions for abashed that I've seen before include "Disconcerted or ashamed" , "Embarrassed or discomfited" , "Had base (anag.)" , "Disturbed" , "Feeling uneasy" .)