Crossword Genius

The endless corrosion brings forceful motivation (6)

Ross

I believe the answer is:

thrust

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'forceful motivation' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'the endless corrosion' is the wordplay.
'endless' means to remove the last letter.
'corrosion' becomes 'rust' (rust is a kind of corrosion).
'the' with its last letter taken away is 'th'.
'th'+'rust'='THRUST'

'brings' acts as a link.

Can you help me to learn more?

(Other definitions for thrust that I've seen before include "Lunge forward" , "Sudden lunge or attack" , "Push suddenly and violently" , "Push forcefully" , "Push forward as with fencing sword" .)

I've seen this clue in the Evening Standard.
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