Try for example by English squad leader (5)
I believe the answer is:
essay
'try' is the definition.
('essay' can be a synonym of 'try')
'for example by english squad leader' is the wordplay.
'for example' becomes 'say' (I've seen this before).
'by' means one lot of letters go next to another.
'leader' suggests taking the first letters.
The first letters of 'english squad' is 'es'.
'say' after 'es' is 'ESSAY'.
(Other definitions for essay that I've seen before include "Prose composition" , "Attempt; written piece" , "Endeavour" , "Short literary piece: attempt" , "Thesis" .)