Grip end of broken halter awkwardly (7)
I believe the answer is:
enthral
'grip' is the definition.
(I've seen this before)
'end of broken halter awkwardly' is the wordplay.
'end of' indicates one should take the final letters.
'awkwardly' is an anagram indicator.
The final letter of 'broken' is 'n'.
'n'+'halter'='nhalter'
'nhalter' is an anagram of 'ENTHRAL'.
(Other definitions for enthral that I've seen before include "absorb" , "Entrance" , "Captivate" , "Hold spellbound" , "Beguile" .)