Opening unctuous wines all over the place is reckless (6)
I believe the answer is:
unwise
'reckless' is the definition.
(thesaurus)
'opening unctuous wines all over the place' is the wordplay.
'opening' indicates taking the first letters.
'all over the place' is an anagram indicator.
The first letter of 'unctuous' is 'u'.
'wines' anagrammed gives 'nwise'.
'u'+'nwise'='UNWISE'
'is' acts as a link.
(Other definitions for unwise that I've seen before include "Not sensible, foolish" , "Ill-judged" , "Not sensible or prudent" , "Foolhardy" , "Lacking sound judgement, maybe foolish" .)