MOS Sir Lancelot

[hoaroak]

5A. Gone off, bad - ??????
6D. Inability to accept -disbelief or misbelief ?
2D. Skill at singing or playing - music?????
15A. Expression of surprise - g????
18A. giving unwanted presence - i?????i?e
16D.immature person - ????g?t?r
7D. City in North West Spain - ??o?
8D. painted, depicted - ??E?

I seem to have a seized up brain or maybe just too many crosswords in one day! Help is very much appreciated. Thanks Hoaroak

[Lie-in King]

5a Addled
6d Disbelief
2d Musicality
15a Golly
18a Intrusive
16d Youngster
7d Leon
8d Drew

[Touchstone]

2d musicality
15a golly
18a intrusive

[nannybooby]

just flipped over the page to sir lancelot 6 down is disbelief (its an anagram of Delibes if)

[hoaroak]

Thanks Lie-in King and Touchstone. I don't know what has happened to my brain today. Thanks for putting me out of my misery. Time for a Caffeine fix!
Many thanks to you both - Hoaroak

[the old mill]

Many thanks to you both and good luck.