Familiar with conditions outside ruined Troy (4,2,2)
I believe the answer is:
used to it
'familiar with' is the definition.
(I've seen this before)
'conditions outside ruined troy' is the wordplay.
I cannot really see how this works, but
an anagram of 'outside' is 'usedtoi' which is located in the answer.
'troy' could be 't' (abbreviation - troy is a unit of weight) and 't' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for used to it that I've seen is " Familiar with".)