Times Cryptic 27,330

[NeilMunro]

Very grateful for all help with these clues please.
1ac: “Male dog is cuddled by computing pro with file? (10).”
3dn: “Water sport for Norman, say, a remote activity (7-7).”
15ac: “A measure of acid, when current, leads to a disorder (7).”
20ac: “Scatter articles from Spanish American writer (4,10).”

[Mamyalynne]

Manicurist

Channel surfing

Aphasia

Ella Fitzgerald

[Lie-in King]

1a Manicurist - 'man' + 'cur (dog) is' (in) 'IT'
3d Channel-surfing (Normans from France)
15a Aphasia - 'a Ph as (when) i (elec. current) a'
20a Ella Fitzgerald (scatter; scat singer) - 'el + la' (Sp. "the"; articles) + '(F Scott) Fitzgerald'

[NeilMunro]

Many thanks!