Prime soccer team extremely economical and balanced (6)

I believe the answer is:

eleven

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

'prime soccer team' is the definition.
'eleven' can be an answer for 'team' (eleven is a kind of team). I am not sure about the 'prime soccer' bit.

'extremely economical and balanced' is the wordplay.
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'and' says to put letters next to each other.
'balanced' becomes 'even' (I've seen this before).
'economical' with its middle removed is 'el'.
'el'+'even'='ELEVEN'

Can you help me to learn more?

(Other definitions for eleven that I've seen before include "Lowest two-digit prime" , "'Legs' bingo number" , "Time for morning coffee" , "Prime number" , "sports team?" .)

I've seen this clue in The Irish Times.

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