At last it's ended by specialist bowlers (4)
I believe the answer is:
tail
'at last' is the definition.
'tail' can be an answer for 'last' (thesaurus). I'm not certain of the 'at' bit.
'it's ended by specialist bowlers' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'ended by specialist bowlers' becomes 'ail' (I can't justify this - if you can you should believe this answer much more).
't'+'ail'='TAIL'
Can you help me to learn more?
(Other definitions for tail that I've seen before include "Follow; end part" , "Follow (a suspect)" , "Rear appendage of animal" , "Shadow" , "Feebler batsmen" .)