Restriction after period of time for entrance (9)
I believe the answer is:
spellbind
'for entrance' is the definition.
(synonyms)
'restriction after period of time' is the wordplay.
'restriction' becomes 'bind'.
'after' says to put letters next to each other.
'period of time' becomes 'spell' (spell is a kind of period of time).
'bind' put after 'spell' is 'SPELLBIND'.
(Other definitions for spellbind that I've seen before include "Enrapture" , "Hold rapt" , "entrance" , "grip" .)