Crossword Genius

Have difficulty with structure? Jiggle round the edges (8)

Ross

I believe the answer is:

struggle

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'have difficulty' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for struggle that I've seen before include "Fight against odds" , "Laboured effort" , "Hard contest" , "Conflict involving effort" , "Uphill battle" .)

I've seen this clue in the Sydney Morning Herald.
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