Blank-looking worker on short holiday (6)
I believe the answer is:
vacant
'blank' is the definition.
(I've seen this in another clue)
'looking worker on short holiday' is the wordplay.
'looking worker' becomes 'ant' (worker is a type of ant. I am not sure about the 'looking' bit.).
'on' is a charade indicator (letters next to each other).
'short holiday' becomes 'vac' (short for vacation).
'ant' after 'vac' is 'VACANT'.
Can you help me to learn more?
(Other definitions for vacant that I've seen before include "Empty - stupid" , "Empty, unoccupied" , "thoughtless" , "available" , "Horse in a race" .)