Saga Cryptic Challenge October 2015

[felly]

I've completed the right-hand side of this crossword but am struggling with the left. Can somebody kick-start me with 7a Drainin' the cask? - on new Hebridean barge? (7)

For 17a Exalted bird is source of magic in primitive religion (7) I have Ibisism which I have worked out as Ibis (exalted bird) is (is) source of magic (m). Is this correct as I don't know of a primitive religion called Isisism.

[Lie-in King]

7a Birlinn (barge) - 'birlin(g)' (drainin[g] liquor) + 'n(ew)'

http://www.collinsdictionary.com/dictionary/english/birlinn

[felly]

Thanks Lie-in King - if the rest are all as difficult as that one I think I'm unlikely to finish it!

[aelmpvw]

17a sevaism? aves raised (exalted) + ism

[Lie-in King]

17a Animism - 'mina' (bird, exalted; raised) + 'is' + 'm(agic)' (?)

[aelmpvw]

looks better than mine lik :-)

[felly]

Thanks aelmpvw. I see that would fit but I omitted to say that the letters I already have for this clue are I?I?ISM and am pretty sure they are correct.

[felly]

This is getting more complicated! Could I have wrongly answered this clue - 15d Handle the lead in Ferrari in top gear (4) I have FIST the I being the first I in Ibisism.

[aelmpvw]

haft

[felly]

Oh yes I see it now. I wasn't completely happy with fist. So haft and animism it is Thanks Lie-in King and aelmpvw.