Crossword Genius

What may be played in church or a pigpen, possibly? (4,5)

Ross

I believe the answer is:

pipe organ

'what may be played in church' is the definition.
(church organ)

'or a pigpen possibly?' is the wordplay.
'possibly?' indicates an anagram (I've seen 'possibly' mean this).
'or'+'a'+'pigpen'='orapigpen'
'orapigpen' is an anagram of 'PIPE-ORGAN'.

(Other definitions for pipe organ that I've seen before include "Musical instrument" , "Traditional church instrument" .)

I've seen this clue in The Telegraph.
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