Urge them to schlep misshapen piece back (5)

I believe the answer is:

impel

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'urge' is the definition.
(impel can mean to urge or demand)

'schlep misshapen piece back' is the wordplay.
'piece' indicates a hidden word.
'back' shows that the letters should be reversed in order.
'lepmi' is hidden in the letters of 'schlep misshapen'.
'lepmi' backwards is 'IMPEL'.

'them to' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for impel that I've seen before include "Urge or propel" , "Force into motion" , "Drive or coerce" , "Make" , "Urge forward, drive" .)

I've seen this clue in The Irish Times.

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