It can be dynamite! (5)
I believe the answer is:
stick
'be dynamite' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'it' is the wordplay.
I cannot quite understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
The remaining letters 'sick' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'can' is the link.
Can you help me to learn more?
(Other definitions for stick that I've seen before include "Tolerate" , "Cane; criticism" , "Flak - cling" , "Adhere - cane" , "Staff - criticism" .)