Drive an officer round with a new MEP (6)

I believe the answer is:

compel

I'm a little stuck... Click here to teach me more about this clue!

'drive an' is the definition.
'compel' can be an answer for 'drive' (I've seen this in another clue). I am unsure of the 'an' bit.

'officer round with a new mep' is the wordplay.
'officer round' becomes 'col' (short for colonel. I am not sure about the 'round' bit.).
'with' indicates putting letters inside.
'a new' indicates an anagram.
'mep' with letters rearranged gives 'mpe'.
'col' going around 'mpe' is 'COMPEL'.

Can you help me to learn more?

(Other definitions for compel that I've seen before include "Bring about by force" , "Coerce, force to obey" , "'Force, oblige (6)'" , "Use force or influence to make something happen" , "Use force, oblige" .)

I've seen this clue in the Evening Standard.

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