They have to work in the corner (7)
I believe the answer is:
seconds
'they' is the definition.
Both the answer and definition are plural nouns.
Perhaps you can see a link between them that I can't see?
'to work in the corner' is the wordplay.
I cannot quite understand how this works, but
'corner' could be 'se' (south east corner of something) and 'se' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'have' is the link.
Can you help me to learn more?
(Other definitions for seconds that I've seen before include "More food!" , "Boxer's aides" , "Units of time" , "in a little while" , "Gives support to" .)