Worried parents welcome time with models (8)
I believe the answer is:
patterns
'models' is the definition.
(pattern is a kind of model)
'worried parents welcome time' is the wordplay.
'worried' indicates anagramming the letters.
'welcome' means one lot of letters goes inside another (in sense of 'inviting in').
'time' becomes 't'.
'parents' is an anagram of 'paterns'.
'paterns' enclosing 't' is 'PATTERNS'.
'with' is the link.
(Other definitions for patterns that I've seen before include "Models for making things" , "'Models, blueprints (8)'" , "Designs, shapes" , "Repeated decorative designs" , "Designs seen in transept" .)