Crossword Genius

Figure takes trip through derelict Acton (7)

Ross

I believe the answer is:

octagon

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

'figure' is the definition.
(type of geometrical figure)

'trip through derelict acton' is the wordplay.
'trip' becomes 'go' (I can't explain this - if you can you should give a lot more credence to this answer).
'through' indicates putting letters inside (inserted letters go through the word).
'derelict' indicates anagramming the letters (a derelict or broken spelling).
'acton' anagrammed gives 'octan'.
'go' placed inside 'octan' is 'OCTAGON'.

'takes' is the link.

Can you help me to learn more?

(Other definitions for octagon that I've seen before include "Eight-sided room" , "Shape of a square with the corners cut off" , "Eight-sided object" , "Eight-sided shape" , "Geometric figure with eight sides" .)

I've seen this clue in The Sun.
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