Look embarrassed when left in the shrubbery (5)
I believe the answer is:
blush
'look embarrassed' is the definition.
(I've seen this before)
'left in the shrubbery' is the wordplay.
'left' becomes 'l' (common abbreviation).
'in the' indicates putting letters inside.
'shrubbery' becomes 'bush' (I can't explain this - if you can you should give a lot more credence to this answer).
'l' placed into 'bush' is 'BLUSH'.
'when' is the link.
Can you help me to learn more?
(Other definitions for blush that I've seen before include "Pinkish type of wine" , "Redden (in the face)" , "reddish tinge" , "Colour" , "Go red" .)