11 across
Just
dread
spending
days
working
in
dark
(10)
Just dread spending days working in dark (10)
hints
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checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Just is the definition here, in the sense of fair or reasonable. Take 'dread' and spend (remove) the two days, each 'd' standing for a day, to leave REA. Then put ON, meaning 'working', inside SABLE, meaning 'dark', to give SONABLE, and stick it all together for REASONABLE.