Beefy one posted to patrol around (7)
I believe the answer is:
topside
'patrol around' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'beefy one posted' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
an anagram of 'posted' is 'topsde' which is located in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for topside that I've seen before include "Deposit (anag) -- cut of meat" , "Cut of beef from thigh" , "Lean cut of beef, no bone" , "Towards ship's upper decks; part of cut of beef" , "Joint" .)