Terminating in Gulf, river irrigating Sumer, primarily? (6)
I believe the answer is:
tigris
'terminating in gulf river irrigating sumer primarily?' is the definition.
I can't judge whether this definition defines the answer.
'terminating in gulf river irrigating sumer primarily?' is the wordplay.
'primarily?' suggests taking the first letters (I've seen 'primarily' mean this).
The initial letters of 'terminating in gulf river irrigating sumer' is 'TIGRIS'.
Can you help me to learn more?
(Other definitions for tigris that I've seen before include "Iraqi river" , "Great river flowing from Turkey through Iraq" , "It flows through Iraq" , "Grit is found in great river of Iraq" , "It flows from Turkey to the Persian Gulf" .)