Suffering from exhaustion, possibly tried to get away (5,3)

I believe the answer is:

tired out

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'suffering from exhaustion' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives sometimes define each other.

'possibly tried to get away' is the wordplay.
'possibly' indicates an anagram.
'to get' means one lot of letters go next to another.
'away' becomes 'out' (synonyms).
'tried' anagrammed gives 'tired'.
'tired'+'out'='TIRED OUT'

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(Another definition for tired out that I've seen is " knackered".)

I've seen this clue in the Evening Standard.

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