Hope for one to compete, collecting right uniform (6)
I believe the answer is:
virtue
'hope for one' is the definition.
(I know that hope is a type of supernatural virtue)
'compete collecting right uniform' is the wordplay.
'compete' becomes 'vie' (synonyms).
'collecting' is an insertion indicator.
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'rt'+'u'='rtu'
'vie' placed around 'rtu' is 'VIRTUE'.
'to' is the link.
(Other definitions for virtue that I've seen before include "Admirable feature" , "Rectitude" , "Patience, for example?" , "High-mindedness" , "It's said to be its own reward" .)