Guardian 25496 Saturday December 3rd 2011

[whirlowcroft]

With grateful thanks for your help.
Another three:
21d Pretends to be from abroad or leaving Sweden (6) --I---
20a When swimming, five catch virus- one pongs. (8) ---L-V-A
26a Web addict swallows drug (crack) (3-5) O-E*-I-E-

[sandyRoe]

21 feigns?

[atrollope]

One liner

[roslyn251254]

21d feigns - f(or)eigns
20a effluvia anagram five + flu(virus) +a (one)
26a on(e)liner

[whirlowcroft]

Perfect, thanks so much.