Crossword Genius

T-junction producing jam? (6)

Ross

I believe the answer is:

tangle

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This could be a double definition.

't-junction' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'jam?' is the second definition.
(thesaurus)

'producing' acts as a link.

Can you help me to learn more?

(Other definitions for tangle that I've seen before include "Twist together; seaweed" , "Snarl-up" , "Snarl or confused mass" , "A knotted mess" , "Confused interwoven mass" .)

I've seen this clue in The Sun.
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