Carry out a grave commitment? (5)

I believe the answer is:

inter

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'carry' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their base form.
Perhaps you can see a link between them that I can't see?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for inter that I've seen before include "Plant" , "set underground" , "Milan FC" , "top Italian side" , "Place in ground" .)

I've seen this clue in The Globe and Mail.

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