Contact Romeo for one (5)
I believe the answer is:
reach
'contact' is the definition.
(I know that contact can be written as reach)
'romeo for one' is the wordplay.
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'for one' becomes 'each' (eg something may be one pound each or for one).
'r'+'each'='REACH'
(Other definitions for reach that I've seen before include "Grasp" , "Get to < throw up in the old" , "Open stretch of water" , "Attain - continuous extent of water" , "Get to; extent" .)