Way mastic perhaps is worked into stone (6)
I believe the answer is:
street
'way' is the definition.
(street is a kind of way)
'worked into stone' is the wordplay.
'worked' becomes 'tree' (I can't explain this - if you can you should give a lot more credence to this answer).
'into' is an insertion indicator.
'stone' becomes 'st' (abbreviation).
'tree' going into 'st' is 'STREET'.
'mastic perhaps is' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for street that I've seen before include "Roadway" , "Way < in which common man is" , "Road lined with buildings" , "lane" , "Thoroughfare lined with buildings" .)
