Naval front line to keep moving about (5)
I believe the answer is:
prowl
'keep moving about' is the definition.
I can't tell whether this defines the answer.
'naval front line' is the wordplay.
'naval front' becomes 'prow' (prow is a kind of front. I am not sure about the 'naval' bit.).
'line' becomes 'l' (used when specifying particular lines from a poem).
'prow'+'l'='PROWL'
'to' is the link.
Can you help me to learn more?
(Other definitions for prowl that I've seen before include "Move in search of prey" , "Nose around" , "Slink after prey" , "Go stealthily, as if searching" , "Go stealthily, predator-like" .)