Married sailor outside home in charge of hired vehicle (7)
I believe the answer is:
minicab
'hired vehicle' is the definition.
(I've seen this before)
'married sailor outside home in charge' is the wordplay.
'married' becomes 'm' (abbreviation, e.g. in genealogy).
'sailor' becomes 'ab' (abbreviation for able seaman).
'outside' is an insertion indicator (some letters go outside others).
'home' becomes 'in' (to be in is to be (at) home).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'm'+'ab'='mab'
'in'+'ic'='inic'
'mab' placed around 'inic' is 'MINICAB'.
'of' acts as a link.
(Other definitions for minicab that I've seen before include "It can't be hailed in the street" , "Metered vehicle for hire" , "Hired vehicle" , "Type of car hire" , "transport" .)