Speak sharply and go for exposure (8)
I believe the answer is:
snapshot
'exposure' is the definition.
(snapshot is a kind of exposure)
'speak sharply and go' is the wordplay.
'speak sharply' becomes 'snap' ('snap' can be a synonym of 'speak sharply').
'and' means one lot of letters go next to another.
'go' becomes 'shot' (I've seen this before**).
'snap'+'shot'='SNAPSHOT'
'for' is the link.
(Other definitions for snapshot that I've seen before include "still taken quickly" , "pic" , "Instant record of an event" , "Picture" , "Quick photograph" .)