Joined me for a bit of tea (3)
I believe the answer is:
met
'joined' is the definition.
(meeting is a kind of joining)
'me for a bit of tea' is the wordplay.
'for' means one lot of letters go next to another.
'a bit of' indicates taking the first letters.
The initial letter of 'tea' is 't'.
'me'+'t'='MET'
(Other definitions for met that I've seen before include "London police (abbr) - New York Museum of Art (abbr)" , "Came together, encountered" , "Encountered or touched" , "Opera company" , "Came across - police in London" .)