Useless in English and gymnastics (5)
I believe the answer is:
inept
'useless' is the definition.
(I've seen this before)
'in english and gymnastics' is the wordplay.
'english' becomes 'e' (abbreviation).
'and' means one lot of letters go next to another.
'gymnastics' becomes 'pt' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in'+'e'+'pt'='INEPT'
Can you help me to learn more?
(Other definitions for inept that I've seen before include "Ham-fisted" , "Silly or senseless" , "Absurd or unskilful" , "Useless, awkward" , "Lacking any competence" .)