Oh, for sure.
What your solicitor is asking the barrister to do
is to apply the barrister's specialist knowledge and skills
to advise whether or not this particular matter
is a matter that has (as lawyers say) "reasonable prospects of success".
("Is there enough here to even "start something"?
And if we do, does it have a reasonable chance of succeeding?")
This is not just tradies coming around to give you free quotes.
In will disputes involving a late-in-life change to the will,
where the capacity of the testator is in question,
and where there can be questions of undue influence, or even duress,
it can get very complex, very quickly.
Emotion, opinion, and "feelings"
are often mistaken (by clients) for evidence.
Medical evidence can be scarce, or inconclusive.
It's a big deal to work out if it's even a goer.