Curtailed the run - it results in sore spots (6)

I believe the answer is:

thrush

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'it results in sore spots' is the definition.
The definition suggests a singular noun which matches the answer.

'curtailed the run' is the wordplay.
'curtailed' means to remove the last letter.
'run' becomes 'rush' (rushing is a kind of running).
'the' with its last letter taken away is 'th'.
'th'+'rush'='THRUSH'

Can you help me to learn more?

(Other definitions for thrush that I've seen before include "Song bird" , "Flyer" , "Throstle" , "Speckle-breasted songbird" , "Bird - fungal disease" .)

I've seen this clue in The Independent.

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