Poor chap! Time to be forceful? (8)
I believe the answer is:
emphatic
'be forceful?' is the definition.
('emphatic' can be a synonym of 'forceful')
'poor chap time' is the wordplay.
'poor' indicates an anagram.
'chap'+'time'='chaptime'
'chaptime' with letters rearranged gives 'EMPHATIC'.
'to' acts as a link.
(Other definitions for emphatic that I've seen before include "Forceful - pronounced" , "In no uncertain terms" , "being stressed" , "Categorical" , "speaking firmly" .)