Dinner for one with Tango in tin? (5)
I believe the answer is:
metal
'tin?' is the definition.
(tin is a kind of metal)
'dinner for one with tango' is the wordplay.
'dinner for one' becomes 'meal' (dinner is a kind of meal).
'with' means one lot of letters goes inside another.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'meal' enclosing 't' is 'METAL'.
'in' acts as a link.
(Other definitions for metal that I've seen before include "Eg, copper" , "Iron, for instance" , "Tin, for example" , "Gambling token" , "Silver or gold, say" .)