Art work little Albert’s left in the open air (6)
I believe the answer is:
fresco
'art work' is the definition.
'fresco' can be an answer for 'work' (I have seen 'Artistic work' mean 'fresco' so perhaps 'work' could also mean 'fresco'). I am unsure of the 'art' bit.
'little albert's left in the open air' is the wordplay.
'little albert' becomes 'al' (short form of the name).
'left' indicates named letters should be taken away.
'in the open air' becomes 'alfresco' (I've seen this before).
'alfresco' with 'al' removed is 'FRESCO'.
Can you help me to learn more?
(Other definitions for fresco that I've seen before include "Painting using watercolours on plaster" , "Mural painted on wet plaster" , "Watercolour done on wet plaster" , "Picture painted on wet plaster" , "Painting done in wet plaster" .)