Old bishop accompanying minister to see (7)
I believe the answer is:
observe
'see' is the definition.
(thesaurus)
'old bishop accompanying minister to' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'bishop' becomes 'b' (abbreviation used in chess).
'accompanying' is a charade indicator (letters next to each other).
'minister to' becomes 'serve' (I've seen this before).
'o'+'b'+'serve'='OBSERVE'
(Other definitions for observe that I've seen before include "Watch without intervening" , "Witness, watch" , "Mark" , "Scrutinise or comply with" , "Look at" .)