Huge mistake during match upset Ipswich captain initially (8)
I believe the answer is:
terrific
'huge' is the definition.
(I've seen this before)
'upset ipswich captain initially' is the wordplay.
'upset' becomes 'terrif' (I can't justify this - if you can you should believe this answer much more).
'initially' indicates taking the first letters.
The initial letters of 'ipswich captain' is 'ic'.
'terrif'+'ic'='TERRIFIC'
'mistake during match' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for terrific that I've seen before include "'Marvellous, wonderful (8)'" , "Marvellous, excellent" , "Fit crier being excellent" , "Marvellous, tremendous" , "Excellent; causing fear" .)