Speak of hesitation by official in game (5)
I believe the answer is:
refer
'speak' is the definition.
(thesaurus)
'hesitation by official in game' is the wordplay.
'hesitation' becomes 'er'.
'by' says to put letters next to each other.
'official in game' becomes 'ref' (short for referee).
'er' after 'ref' is 'REFER'.
'of' is the link.
(Other definitions for refer that I've seen before include "Bring up" , "Pertain or cite" , "Send a patient to a specialist" , "Draw attention" , "Allude, assign" .)