Had a stab as said by visitor (5)
I believe the answer is:
guest
'visitor' is the definition.
(someone visiting a place)
'had a stab as said by' is the wordplay.
'had a stab as' becomes 'gues' (I can't explain this - if you can you should give a lot more credence to this answer).
'said' becomes 't' (I've seen this in other clues).
'by' means one lot of letters go next to another.
'gues'+'t'='GUEST'
Can you help me to learn more?
(Other definitions for guest that I've seen before include "Invitee" , "Invited visitor" , "Recipient of hospitality" , "Caller" , "One receiving hospitality" .)