Group of ships on loch in expedition? (9)

I believe the answer is:

fleetness

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

'expedition?' is the definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'group of ships on loch' is the wordplay.
'group of ships' becomes 'fleet' (eg a naval fleet).
'on' says to put letters next to each other.
'loch' becomes 'ness' (Loch Ness in Scotland).
'fleet'+'ness'='FLEETNESS'

'in' is the link.

Can you help me to learn more?

(Another definition for fleetness that I've seen is " Swiftness, speed".)

I've seen this clue in The Independent.

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