Possibly wake in an enfeebled condition (4)

I believe the answer is:

weak

I'm a little stuck... Click here to teach me more about this clue!

'enfeebled condition' is the definition.
'weak' can be an answer for 'enfeebled' (thesaurus). I'm not sure about the 'condition' bit.

'possibly wake in' is the wordplay.
'wake' anagrams to 'WEAK'.
Though, I'm not clear how the anagram is indicated.

'an' is the link.

Can you help me to learn more?

(Other definitions for weak that I've seen before include "Faint; frail" , "Puny" , "Easily led" , "Feeble or frail" , "Spent" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app