Never really cross, Mick's content living with no fixed abode (7)
I believe the answer is:
nomadic
'living with no fixed abode' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'never really cross mick's content' is the wordplay.
'never' becomes 'no' (I've seen this in other clues).
'really cross' becomes 'mad' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'content' says to take the centre.
The middle of 'mick' is 'ic'.
'no'+'mad'+'ic'='NOMADIC'
Can you help me to learn more?
(Other definitions for nomadic that I've seen before include "Unsettled" , "Not settled" , "Peripatetic" , "Homeless - wandering" , "vagrant" .)