Lowest class on board gives pilot overtime (8)
I believe the answer is:
steerage
'lowest class' is the definition.
(I've seen this in another clue)
'board gives pilot overtime' is the wordplay.
I cannot really understand how this works, but
'pilot' could be 'steer' (both can mean to direct) and 'steer' is found within the answer.
The remaining letters 'age' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'on' acts as a link.
Can you help me to learn more?
(Other definitions for steerage that I've seen before include "Cheapest part of liner" , "avoided by the "posh" set" , "Cheapest classes" , "Cheap part of ship" , "Part of ship with lowest fares" .)