French wine gets endless regard but it tastes sour (7)
I believe the answer is:
vinegar
'sour' is the definition.
(thesaurus)
'french wine gets endless regard' is the wordplay.
'french wine' becomes 'vin' ('wine' in French).
'gets' says to put letters next to each other.
'endless' says to take the centre.
The central letters of 'regard' are 'egar'.
'vin'+'egar'='VINEGAR'
'but it tastes' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for vinegar that I've seen before include "Sour-tasting liquid as condiment" , "Pickling condiment" , "Soured wine, cider etc." , "bad wine?" , "Acidic condiment" .)