Rough home with old lover getting to perform (7)
I believe the answer is:
inexact
'rough' is the definition.
(similar in meaning)
'home with old lover getting to perform' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'with' says to put letters next to each other.
'old lover' becomes 'ex' (an ex-lover).
'getting to' says to put letters next to each other.
'perform' becomes 'act' (acting is a kind of performing).
'in'+'ex'+'act'='INEXACT'
(Other definitions for inexact that I've seen before include "Imprecise - inaccurate in" , "Nice tax (anag) - approximate" , "Nice tax (nag.)" , "Rough" , "Vague" .)