Supporter, maybe with power (5)

I believe the answer is:

pylon

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'supporter' is the definition.
(I have seen 'A supporter' mean 'pylon' so perhaps 'supporter' could also mean 'pylon')

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for pylon that I've seen before include "Structure supporting power cables" , "Steel tower carrying power lines" , "High-tension power line support" , "it may mark a turning point" , "current supporter" .)

I've seen this clue in the Evening Standard.

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