Adjusted number on front door (5)
I believe the answer is:
tuned
'adjusted' is the definition.
(tuning is a kind of adjusting)
'number on front door' is the wordplay.
'number' becomes 'tune' (I've seen this in another clue).
'on front' suggests taking the first letters.
The first letter of 'door' is 'd'.
'tune'+'d'='TUNED'
(Other definitions for tuned that I've seen before include "Adjusted (eg, a piano)" , "Got engine right" , "Given the correct pitch" , "(Of radio) set to a frequency" , "arranged for reception" .)