Really drunk by one bracer of the same concentration (8)
I believe the answer is:
isotonic
'really drunk by one bracer of the same concentration' is the definition.
I can't judge whether this defines the answer.
'really drunk by one bracer' is the wordplay.
'really' becomes 'so' (both can mean 'extremely').
'drunk by' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'bracer' becomes 'tonic' (I've seen this in another clue).
'i'+'tonic'='itonic'
'so' placed within 'itonic' is 'ISOTONIC'.
Can you help me to learn more?
(Other definitions for isotonic that I've seen before include "(Of muscle action) taking place with normal contraction" , "sort of muscle action" , "Type of drink restoring body fluids and salts" , "(Of a drink) having the same concentrations of salts and minerals as in the body" , "drink sold at the leisure centre" .)