Fred's on form, so get him here! (4,3)

I believe the answer is:

send for

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'get him here' is the definition.
The definition suggests a singular noun but the answer is not.

'fred's on form' is the wordplay.
'form' indicates an anagram.
'freds'+'on'='fredson'
'fredson' with letters rearranged gives 'SEND FOR'.

'so' is the link.

Can you help me to learn more?

(Another definition for send for that I've seen is " Order to come or be brought".)

I've seen this clue in the Evening Standard.

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