Occasionally tries twine making lace again (5)
I believe the answer is:
retie
'lace again' is the definition.
(I've seen this in another clue)
'occasionally tries twine' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'tries'+'twine'='triestwine'
The alternating letters of 'triestwine' are 'RETIE'.
'making' acts as a link.
(Other definitions for retie that I've seen before include "Bind again" , "Make knot or bow again" , "Link up again" , "make another knot" , "restore connection" .)