Gypsy here and there entertained by 2240-pound boxer? (5)
I believe the answer is:
tyson
'boxer?' is the definition.
(US boxer Mike Tyson)
'gypsy here and there entertained by 2240-pound' is the wordplay.
'here and there' means one should take alternating letters (here and then can mean regularly).
'entertained by' is an insertion indicator (inserted letters are hosted or entertained).
'oo40-pound' becomes 'ton' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The alternate letters of 'gypsy' are 'ys'.
'ys' going inside 'ton' is 'TYSON'.
Can you help me to learn more?
(Other definitions for tyson that I've seen before include "US world heavyweight boxing champion, b.1966 -- English fast bowler, d. 2015" , "26 4 [RING MASTER]" , "Undisputed world heavyweight champion, 1987" , "Mike ..., former US prizefighter" , "American world heavyweight champion, b. 1966" .)