Conditions on home straight are clear (2,5,5)

'clear' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'conditions on home straight' is the wordplay.
I cannot really understand how this works, but
'conditions' could be 'terms' ('term' can be a synonym of 'condition') and 'terms' is found in the answer.
'home' could be 'in' ('he's home' can mean 'he's in') and 'in' is located in the answer.
'straight' could be 'plain' (synonyms) and 'plain' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

'are' acts as a link.

Can you help me to learn more?