Crossword Genius

Drink nothing when back for work (4)

Ross

I believe the answer is:

opus

I'm a little stuck... Click here to teach me more about this clue!

'for work' is the definition.
(an opus is an artistic work)

'drink nothing when back' is the wordplay.
'drink' becomes 'sup' (to sup is to drink).
'nothing when' becomes 'o' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'back' is a reversal indicator.
'sup'+'o'='supo'
'supo' backwards is 'OPUS'.

Can you help me to learn more?

(Other definitions for opus that I've seen before include "Work (mus.)" , "Composer's work" , "Work (of a composer?)" , "A Latin work" , "Composition - magnum __" .)

I've seen this clue in The Sun.
Want a hint initially instead of a full solution? Install my app