Artist and lecturer producing toxic gas (5)
I believe the answer is:
radon
'toxic gas' is the definition.
'radon' can be an answer for 'gas' (I've seen this before). I'm not sure about the 'toxic' bit.
'artist and lecturer' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'and' says to put letters next to each other.
'lecturer' becomes 'don' (don can mean an academic).
'ra'+'don'='RADON'
'producing' acts as a link.
Can you help me to learn more?
(Other definitions for radon that I've seen before include "Natural gas considered a hazard to health" , "Naturally occurring inert gas" , "Colourless gas, atomic number 86" , "hazardous substance" , "Inert gas that occurs naturally" .)