Aberdeen terrier holds record (5)
I believe the answer is:
enter
'record' is the definition.
(enter can mean to enter into a record)
'aberdeen terrier holds' is the wordplay.
'holds' indicates the answer is hidden within the clue.
'ENTER' is hidden within 'aberdeen terrier'.
(Other definitions for enter that I've seen before include "Come/go in" , "Go in and put in the ledger" , "Infiltrate" , "Enroll, sign up" , "submit?" .)