Given that:
Liberación de Gastos

La garantía de responsabilidad civil se entenderá liberada de cualquier deducción por gastos judiciales o extrajudiciales, que, como consecuencia de la tramitación del expediente del siniestro se hayan producido a la aseguradora, cuando aquellos gastos sumados a la indemnización satisfecha escedan de la citada garantía.

I eventually came across this:
DEFENSE COVERAGE
Defense or supplementary payments can be handled in two ways. The first option is commonly known as "defense outside the limits of liability." This is the most desirable option.

Suppose you are undergoing a lawsuit. If your policy provides defense outside limits, then the legal cost to defend (lawyers' fees and court costs) do not erode or effect your policy limits. The policy limits only apply to damages that may be incurred.

The second option is commonly known as "defense inside limits of liability." This means that the policy limits as stated on your policy are the total costs that the insurance company will pay on your behalf for any given loss, legal costs and damages.

have also come across "defense costs paid in addition (to the limit of liability). Both came up with about 25 hits each in Google

Attaching two insurance glossaries - the first has the term.