Arrived on a little isthmus in Med, took the plunge (7)
I believe the answer is:
married
'took the plunge' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'arrived on a little isthmus in med' is the wordplay.
'arrived' becomes 'arr' (abbreviation used in transport).
'on' says to put letters next to each other.
'a little' suggests taking the first letters.
'in' indicates putting letters inside.
The initial letter of 'isthmus' is 'i'.
'arr'+'i'='arri'
'arri' put into 'med' is 'MARRIED'.
Can you help me to learn more?
(Other definitions for married that I've seen before include "Admirer (anag)" , "9 across (anag)" , "Closely linked" , "disqualified from new romance?" , "United, wed" .)