Show support for funny red nose (7)
I believe the answer is:
endorse
'show support' is the definition.
'endorse' can be an answer for 'support' (I've seen this before). I am not certain of the 'show' bit.
'funny red nose' is the wordplay.
'funny' indicates an anagram.
'red'+'nose'='rednose'
'rednose' with letters rearranged gives 'ENDORSE'.
'for' is the link.
Can you help me to learn more?
(Other definitions for endorse that I've seen before include "Support; sanction" , "Sanction -- red nose (anag)" , "Docket" , "Favour" , "Advocate" .)