Two ways to be humble (6)
I believe the answer is:
modest
'be humble' is the definition.
(similar in meaning)
'two ways' is the wordplay.
'two ways' can mean two replacements for 'way'.
'way' becomes 'mode' (synonyms).
'way' becomes 'st' (abbreviation for street).
'mode'+'st'='MODEST'
'to' is the link.
(Other definitions for modest that I've seen before include "retiring" , "Unassuming; small" , "Having a humble opinion of oneself" , "Not vain, rather shy" , "Not having or showing pride" .)