Tense Scot - he's in charge? (11)

I believe the answer is:

electrician

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'he's in charge?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'tense scot' is the wordplay.
'tense' becomes 'electric' (similar in meaning).
'scot' becomes 'ian'.
'electric'+'ian'='ELECTRICIAN'

Can you help me to learn more?

(Other definitions for electrician that I've seen before include "One who might install mains wiring" , "Installer of mains-powered equipment" , "One doing wiring, etc" , "One wiring house" , "One who might wire a house" .)

I've seen this clue in The Daily Express.

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