Those supporting Mr Morgan (5)

I believe the answer is:

piers

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

'morgan' is the definition.
(Piers Morgan)

I don't understand the remainder of the clue.

(Other definitions for piers that I've seen before include "Supports for bridge spans" , "Old ploughman" , "Landing stages" , "Jetties" .)

I've seen this clue in The Times and The Sunday Times.

Want a hint initially instead of a full solution? Install my app