Crossword Genius

Praise overlooking a railway affair? (8)

Ross

I believe the answer is:

adultery

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

'affair?' is the definition.
(I've seen this before)

'praise overlooking a railway' is the wordplay.
I cannot really see how this works, but
'a' is found in the answer.
'railway' could be 'ry' (abbreviation for railway) and 'ry' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for adultery that I've seen before include "Betrayal of a partner" , "Seventh Commandment infraction" , "excluding union involvement?" , "cheating" , "form of betrayal" .)

I've seen this clue in The Times.
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