In the end, many will give tongue (5)
I believe the answer is:
tamil
'tongue' is the definition.
(Tamil is an example)
'in the end many' is the wordplay.
'in' indicates putting letters inside.
'the end' becomes 'tail' (tail is a kind of end).
'many' becomes 'm' (Roman numeral for a thousand).
'tail' placed around 'm' is 'TAMIL'.
'will give' is the link.
(Other definitions for tamil that I've seen before include "Dravidian people of India and Sri Lanka" , "Asian language" , "South Indian people or language" , "Sri Lankan" , "An official language of Sri Lanka" .)