Pound for one beer starts to see excited language at the bar (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

L (abbreviation for a pound in UK money, from Latin libra ) + EG (e.g. = for example = for one) + ALE (beer) + starting letters of S [ee] E [xcited]. At the bar = working in the legal profession.