Try drug provided by son, for example (5)
I believe the answer is:
essay
'try' is the definition.
(essay can mean to try or attempt something)
'drug provided by son for example' is the wordplay.
'drug' becomes 'e' (E is another name for ecstasy).
'provided by' says to put letters next to each other.
'son' becomes 's' (genealogical abbreviation for son).
'for example' becomes 'say' ('say' can be used to introduce an example).
'e'+'s'+'say'='ESSAY'
(Other definitions for essay that I've seen before include "Composition; attempt" , "Test" , "Scholarly work" , "Prose composition" , "Attempt; written piece" .)