Servant upset home interrupting dinner maybe (6)
I believe the answer is:
menial
'servant' is the definition.
(I've seen this before)
'upset home interrupting dinner maybe' is the wordplay.
'upset' shows that the letters should be reversed in order.
'home' becomes 'in' ('he's home' can mean 'he's in').
'interrupting' indicates putting letters inside.
'dinner maybe' becomes 'meal' (I've seen this in other clues).
'in' written backwards gives 'ni'.
'ni' put within 'meal' is 'MENIAL'.
(Other definitions for menial that I've seen before include "(Of job) low in prestige" , "'Humble, lowly, work say (6)'" , "Subservient, lowly" , "Servile of lowly" , "(Of work) unskilled" .)