Drunk on about work in circus feature (9)
I believe the answer is:
tightrope
'circus feature' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'drunk on about work' is the wordplay.
'drunk' becomes 'tight' (I've seen this before).
'on' becomes 're' ('on' can be mean 'with reference to').
'about' means one lot of letters goes inside another.
'work' becomes 'op' (common abbreviation for 'opus').
're' going around 'op' is 'rope'.
'tight'+'rope'='TIGHTROPE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for tightrope that I've seen before include "An acrobat walks on this high above the ground" , "Acrobat's wire" , "Acrobats perform on it, usually with safety net" , "Difficult thing to walk on" , "Balancing act wire" .)