Odd bits of ordeal forgotten with a kiss producing calm (5)
I believe the answer is:
relax
'calm' is the definition.
(thesaurus)
'odd bits of ordeal forgotten with a kiss' is the wordplay.
'odd bits of' indicates alternate letters.
'forgotten with' becomes 'a' (I am not sure about this - if you are sure you should believe this answer much more).
'a kiss' becomes 'x' (X can represent a kiss).
The alternate letters of 'ordeal' are 'rel'.
'rel'+'a'+'x'='RELAX'
'producing' acts as a link.
(Other definitions for relax that I've seen before include "Put your feet up" , "Abate" , "Hang loose" , "Wind down" , "Slacken" .)