Skill in manoeuvring an ordinary vessel (11)

I believe the answer is:

generalship

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'skill' is the definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'manoeuvring an ordinary vessel' is the wordplay.
'manoeuvring an ordinary' becomes 'general' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'vessel' becomes 'ship' (ship is a kind of vessel).
'general'+'ship'='GENERALSHIP'

'in' is the link.

Can you help me to learn more?

(Other definitions for generalship that I've seen before include "The art of manipulating armies" , "strategist's concern" .)

I've seen this clue in The Globe and Mail.

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