Climb onto Supreme Court with beer (5)
I believe the answer is:
scale
'climb' is the definition.
(I know that scale is a more specific form of the action climb)
'supreme court with beer' is the wordplay.
'supreme court' becomes 'sc' (this might be a standard abbreviation I've not previously seen).
'with' says to put letters next to each other.
'beer' becomes 'ale' (type of beer).
'sc'+'ale'='SCALE'
'onto' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for scale that I've seen before include "Climb, or series of notes in music" , "See 23" , "Climb; overlapping plate" , "Relative extent as of laces" , "Series of notes in an octave" .)