Cheer European and others on the way up (5)
I believe the answer is:
elate
'cheer' is the definition.
(I've seen this in other clues)
'european and others on the way up' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'and others' becomes 'etal' ('et al.' can be a synonym of 'and others').
'on the way up' says the letters should be written in reverse.
'etal' in reverse letter order is 'late'.
'e'+'late'='ELATE'
(Other definitions for elate that I've seen before include "Doctor suitor to Anne Page (MWOW)" , "Fill with joy" , "Excite" , "Uplift (mood)" , "Encourage" .)