Start of last over — our players end in ignominy, being dreadful (5)
I believe the answer is:
lousy
'dreadful' is the definition.
(thesaurus)
'start of last over our players end in ignominy' is the wordplay.
'start of' indicates taking the first letters.
'our players' becomes 'us' ('us' can refer to a person's sports team).
'end in' says to take the final letters.
The initial letters of 'last over' is 'lo'.
The final letter of 'ignominy' is 'y'.
'lo'+'us'+'y'='LOUSY'
'being' acts as a link.
(Other definitions for lousy that I've seen before include "Rotten" , "Infested; of poor quality" , "Very bad; infested" , "crawling with insects" , "Infested by bloodsuckers" .)