Crossword Genius

Armies move easily around Spain, uplifting the historic catering supplier (7,7)

Ross

I believe the answer is:

hostess trolley

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

'historic catering supplier' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'armies move easily around spain uplifting the' is the wordplay.
I cannot quite see how this works, but
'move' could be 'stroll' (stroll is a kind of move) and 'stroll' is located in the answer.
'around' could be 'o' (I've seen this in other clues) and 'o' is located in the answer.
'spain' could be 'es' (es is an abbreviation for Spain) and 'es' is located in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for hostess trolley that I've seen is " assistance for server".)

I've seen this clue in The Telegraph.
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