Crossword Genius

Relationship with fifty-one first-class offspring (7)

Ross

I believe the answer is:

liaison

'relationship' is the definition.
(I know that liaison is a type of sexual relationship)

'with fifty-one first-class offspring' is the wordplay.
'with' means one lot of letters go next to another.
'fifty one' becomes 'LI' (Roman numerals).
'first class' becomes 'ai' (A1 - top quality).
'offspring' becomes 'son' (male offspring).
'li'+'ai' is 'liai'.
'liai'+'son'='LIAISON'

(Other definitions for liaison that I've seen before include "Co-operation; love affair" , "carryon" , "Secret love-affair" , "Mutual communication and co-operation" , "Communication between people or organisations" .)

I've seen this clue in The Guardian.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.