Stumble where Romeo blocks advice (4)
I believe the answer is:
trip
'stumble' is the definition.
(synonyms)
'romeo blocks advice' is the wordplay.
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'blocks' means one lot of letters goes inside another (the inside letters form a 'blockage').
'advice' becomes 'tip' (a tip is a piece of advice).
'r' placed inside 'tip' is 'TRIP'.
'where' is the link.
(Other definitions for trip that I've seen before include "(Cause to) fall" , "Journey, excursion" , "Catch one's foot" , "A short journey - stumble on it" , "Ride" .)