Explanations Needed

[stevenj]

I THINK I have finished. Only think because whilst I have some answers that fit part of the clues I can't work out why. As always, I'd be grateful for explanations.
The first is: European cracks first goal, one for anybody to see. My answer is "open letter which fits the second part of the clue. But I don't get the first part.
The other is Close friends with fiery temperament, British and non-British. I am sure the answer is "blood brothers" but I don't understand the reference to fiery temperaments.
Please help.
steven

[cashier]

First goal Opener and European lett from Latvia

[Lie-in King]

Hi Steven -

Open letter - 'Lett' (European, in) 'opener' (first goal)
Blood (fiery temperament) + 'Br(itish)' + 'others'

[stevenj]

Thank you. that's a start. The other?
steven

[Lie-in King]

https://en.oxforddictionaries.com/definition/blood

^Def 3

[Toorak]

^^^^

[stevenj]

Sorry Lie-in King . Your explanation hadn't come through when I thanked Cashier. Does "blood" really mean "fiery temperament"?

[Toorak]

Yes - follow the link LIK provided ( definition 3)

[stevenj]

OK. Well, if you and the Oxford dictionary say so, I shall obviously back off!

Thank you so much ,sir. And just in time. SWMBO just called me for my supper.