Romeo in travelling eagerly makes brew (4,4)
I believe the answer is:
earl grey
'brew' is the definition.
(I've seen this before)
'romeo in travelling eagerly' is the wordplay.
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' indicates putting letters inside.
'travelling' indicates anagramming the letters.
'eagerly' anagrammed gives 'ealgrey'.
'r' placed within 'ealgrey' is 'EARL GREY'.
'makes' is the link.
(Other definitions for earl grey that I've seen before include "Variety of tea flavoured with bergamot" , "Bergamot-flavoured tea blend" , "Flavoured kind of tea" , "Drunk leaves" , "Red cell deficiency" .)