Rock bands love sex from behind in isolated environments (9)

'isolated environments' is the definition.
(isolated part of a system for testing software)

'rock bands love sex from behind' is the wordplay.
'rock' is an anagram indicator (the solver must 'rock' the letters around).
'love' becomes 'o' (love means zero in tennis).
'from behind' is a reversal indicator.
'sex' written backwards gives 'xes'.
'bands' anagrammed gives 'sandb'.
'sandb'+'o'+'xes'='SANDBOXES'

'in' acts as a link.