Incline towards terrible dent (4)

I believe the answer is:

tend

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'incline towards' is the definition.
(as in tending towards something)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for tend that I've seen before include "See to" , "Incline - mind" , "Be inclined to take care of" , "Look after, or take certain direction" , "Head" .)

I've seen this clue in The Mirror.

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