That straggly bush right in the middle? (5)

I believe the answer is:

shrub

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'bush right in the middle?' is the definition.
'shrub' can be an answer for 'bush' (I've seen this in another clue). I'm not certain of the 'right in the middle?' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for shrub that I've seen before include "Cordial" , "Woody plant, bush" , "Plant - brush (anag)" , "Woody plant smaller than a tree" , "Elder" .)

I've seen this clue in the Evening Standard.

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