Have difficulty with structure? Jiggle round the edges (8)
I believe the answer is:
struggle
'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" .)