Natural, as no cigar can be (7)
I believe the answer is:
organic
'natural' is the definition.
(similar in meaning)
'no cigar can be' is the wordplay.
'can be' indicates an anagram.
'no'+'cigar'='nocigar'
'nocigar' is an anagram of 'ORGANIC'.
'as' is the link.
(Other definitions for organic that I've seen before include "In cargo (anag.)" , "No cigar (anag.)" , "without the use of chemicals" , "Fundamental" , "Non-chemical" .)