Danish canapés potentially causing discomfort (5,3,5)
I believe the answer is:
aches and pains
'discomfort' is the definition.
(thesaurus)
'danish canapes potentially' is the wordplay.
'potentially' is an anagram indicator (letters have the potential to spell a new word).
'danish'+'canapes'='danishcanapes'
'danishcanapes' with letters rearranged gives 'ACHES AND PAINS'.
'causing' acts as a link.
(Other definitions for aches and pains that I've seen before include "suffer these?" , "Minor ailments" , "Minor physical discomforts" , "A visit to no.13 [CLINIC] might be necessary after" , "nagging discomfort" .)