One getting up vertical pipe (5)

I believe the answer is:

riser

I believe this clue is a double definition.

'one getting up' is the first definition.
(one rising or getting up)

'vertical pipe' is the second definition.
(I've seen this before)

(Other definitions for riser that I've seen before include "Front of a staircase step" , "Vertical piece between treads of staircase" , "person advancing position?" , "Upright piece in stairs" , "Upwardly mobile type" .)

I've seen this clue in The Telegraph.

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